"once in a while" meaning in All languages combined

{
  "etymology_text": ": once in a while < → δείτε τις λέξεις once, in, a και while",
  "forms": [
    {
      "form": "once in a while"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "related": [
    {
      "word": "every once in a while"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Ιδιωματισμοί (αγγλικά)",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "text": "The officer appears once in a while.",
          "translation": "Ο αξιωματικός κάθε τόσο εμφανίζεται."
        },
        {
          "text": "≈ συνώνυμα: → δείτε τη λέξη occasionally"
        }
      ],
      "glosses": [
        "κάθε τόσο"
      ],
      "id": "el-once_in_a_while-en-adv-Nj~lF34u",
      "raw_tags": [
        "ιδιωματισμός"
      ]
    }
  ],
  "word": "once in a while"
}

{
  "etymology_text": ": once in a while < → δείτε τις λέξεις once, in, a και while",
  "forms": [
    {
      "form": "once in a while"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adv",
  "related": [
    {
      "word": "every once in a while"
    }
  ],
  "senses": [
    {
      "categories": [
        "Ιδιωματισμοί (αγγλικά)"
      ],
      "examples": [
        {
          "text": "The officer appears once in a while.",
          "translation": "Ο αξιωματικός κάθε τόσο εμφανίζεται."
        },
        {
          "text": "≈ συνώνυμα: → δείτε τη λέξη occasionally"
        }
      ],
      "glosses": [
        "κάθε τόσο"
      ],
      "raw_tags": [
        "ιδιωματισμός"
      ]
    }
  ],
  "word": "once in a while"
}