"upon one's speed" meaning in English

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prepositional phrase",
        "head": ""
      },
      "expansion": "upon one's speed",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "upon one's speed",
      "name": "en-PP"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep_phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
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      "examples": [
        {
          "ref": "1662, Thomas Salusbury, Galileo's dialogue Concerning the Two Chief World Systems (Dialogue Two)",
          "text": "In case any one, riding a horse that was upon his speed, should let a bowl drop out of his hand, that bowl being fallen to the ground would continue its motion and follow the horses steps, without tarrying behind him."
        },
        {
          "ref": "1670, John Milton, The History of Britain, That Part Especially Now Call'd England",
          "text": "Riding on the speed down a steep Hill.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "At speed; moving rapidly."
      ],
      "id": "en-upon_one's_speed-en-prep_phrase-pgxiS9VA",
      "links": [
        [
          "rapidly",
          "rapidly"
        ]
      ],
      "raw_glosses": [
        "(obsolete) At speed; moving rapidly."
      ],
      "synonyms": [
        {
          "word": "upon the speed"
        },
        {
          "word": "at the speed"
        },
        {
          "word": "at one's speed"
        },
        {
          "word": "on one's speed"
        },
        {
          "word": "on the speed"
        }
      ],
      "tags": [
        "obsolete"
      ]
    }
  ],
  "word": "upon one's speed"
}

{
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "prepositional phrase",
        "head": ""
      },
      "expansion": "upon one's speed",
      "name": "head"
    },
    {
      "args": {},
      "expansion": "upon one's speed",
      "name": "en-PP"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "prep_phrase",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English prepositional phrases",
        "English terms with obsolete senses",
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1662, Thomas Salusbury, Galileo's dialogue Concerning the Two Chief World Systems (Dialogue Two)",
          "text": "In case any one, riding a horse that was upon his speed, should let a bowl drop out of his hand, that bowl being fallen to the ground would continue its motion and follow the horses steps, without tarrying behind him."
        },
        {
          "ref": "1670, John Milton, The History of Britain, That Part Especially Now Call'd England",
          "text": "Riding on the speed down a steep Hill.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "At speed; moving rapidly."
      ],
      "links": [
        [
          "rapidly",
          "rapidly"
        ]
      ],
      "raw_glosses": [
        "(obsolete) At speed; moving rapidly."
      ],
      "tags": [
        "obsolete"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "upon the speed"
    },
    {
      "word": "at the speed"
    },
    {
      "word": "at one's speed"
    },
    {
      "word": "on one's speed"
    },
    {
      "word": "on the speed"
    }
  ],
  "word": "upon one's speed"
}