"kreivin aikaan" meaning in Finnish

{
  "etymology_text": "Originally a reference to the period when count Per Brahe ruled Finland as governor general of Gustavus Vasa in mid-17th century. This period was regarded as one of very favorable development for the country. Compare Swedish i grevens tid.",
  "head_templates": [
    {
      "args": {
        "1": "fi",
        "2": "phrase",
        "head": "kreivin aikaan"
      },
      "expansion": "kreivin aikaan",
      "name": "head"
    }
  ],
  "lang": "Finnish",
  "lang_code": "fi",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Finnish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "At the best possible moment; at the most appropriate time; right when needed."
      ],
      "id": "en-kreivin_aikaan-fi-phrase-ucF7ROx1",
      "raw_glosses": [
        "(idiomatic) At the best possible moment; at the most appropriate time; right when needed."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "word": "kreivin aikaan"
}

{
  "etymology_text": "Originally a reference to the period when count Per Brahe ruled Finland as governor general of Gustavus Vasa in mid-17th century. This period was regarded as one of very favorable development for the country. Compare Swedish i grevens tid.",
  "head_templates": [
    {
      "args": {
        "1": "fi",
        "2": "phrase",
        "head": "kreivin aikaan"
      },
      "expansion": "kreivin aikaan",
      "name": "head"
    }
  ],
  "lang": "Finnish",
  "lang_code": "fi",
  "pos": "phrase",
  "senses": [
    {
      "categories": [
        "Finnish entries with incorrect language header",
        "Finnish idioms",
        "Finnish lemmas",
        "Finnish multiword terms",
        "Finnish phrases",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "At the best possible moment; at the most appropriate time; right when needed."
      ],
      "raw_glosses": [
        "(idiomatic) At the best possible moment; at the most appropriate time; right when needed."
      ],
      "tags": [
        "idiomatic"
      ]
    }
  ],
  "word": "kreivin aikaan"
}