noun, noun which may take the genitive case particle 'no'
Often used in medical or technical writing to describe something that occurs many times or at short intervals. Similar to 頻繁 but more formal and less common in everyday speech.
See also: 頻繁
頻回の検査が必要です。
Frequent examinations are necessary.
この症状は頻回に起こる。
This symptom occurs frequently.