Word that means 'not uncommon but not frequent'?

I'm trying to describe something that happens fairly regularly - but using one word! I'm describing three things: one is very common, one is very rare and the third is...somewhere between the two. What's a good word to describe the middling event? Has to be formal/scientific word.

3 Answers

Relevance
  • 8 years ago
    Favorite Answer

    intermittent is a good word.

  • 8 years ago

    Occasionally

  • Loa
    Lv 5
    8 years ago

    Sometimes?

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