頻繁|ひんぱんhinpan[0]heiban (flat)

1. na-adjectivefrequent; incessant
   電車でんしゃはバスより頻繁ひんぱんに来きます。↗

   Trains come more often than buses.

• SynonymしょっちゅうNeutralColloquial: all the time or at every turn, as in 「しょっちゅう遅刻する」. 「頻繁」 is the more written, objective choice.
• SynonymちょくちょくNeutralColloquial and casual: now and then, often, as in 「ちょくちょく顔を出す」. 「頻繁」 sounds more written.
• SynonymしばしばNeutralSame 'again and again' sense as 「しばしば」; this kanji form is mostly confined to reports and academic papers.
• SynonymしきりにNeutralFrequently and eagerly, as in 「しきりに頷く」; stresses repeated, often keen, action.
• RelatedしばしばNeutralSame 'again and again' sense as 「しばしば」; this kanji form is mostly confined to reports and academic papers.
• RelatedよくNeutralThe most common spoken way to say 'often', as in 「よく行く店」; it also means 'well', so context tells the senses apart.
• Related再三さいさんNeutralAgain and again, as in 「再三注意した」; typical when repeating reminders or warnings.
• Related再々さいさいWrittenWritten word close to 「再三」 in meaning but rarely used.
• Related始終しじゅうNeutralFrom start to finish, always, as in 「始終笑っている」; stresses continuity rather than sheer frequency.
• Related絶えずたえずNeutralConstantly, without interruption, as in 「絶えず努力する」; stresses that something never stops.
• RelatedちょいちょいNeutralCasual spoken word for 'now and then', as in 「ちょいちょい来る」; carries a relaxed, offhand feel.
• RelatedちょこちょこNeutralColloquial: taking small quick steps, or making frequent little movements, as in 「ちょこちょこ動く」.
• RelatedしげしげWrittenWritten word that can mean 'often' but today mostly means gazing closely at something, as in 「しげしげと見る」.
• RelatedしきりとWrittenWritten equivalent of 「しきりに」: incessantly, over and over, as in 「しきりと鳴く」.
• Related高頻度こうひんどFormalFormal noun for 'high frequency', as in 「高頻度で発生」; mostly in technical or scientific contexts.
• Related重ね重ねかさねがさねFormalSolemn, formal 'over and over'; also conveys heartfelt sincerity in thanks or apologies, as in 「重ね重ねお礼申し上げます」.
• AntonymまれNeutralThe antonym: rare, seldom happening, as in 「まれに起こる」.

Use 「頻繁」 for things that happen over and over; it leans written and objective, as in 「頻繁に連絡する」. In speech, 「しょっちゅう」 and 「よく」 are the natural choices, with casual 「ちょくちょく」 and 「ちょいちょい」 nearby. For objective written accounts pick 「しばしば」 or 「再三」; 「絶えず」 and 「始終」 stress unbroken continuity; 「まれ」 is the opposite, meaning rare.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. しきりに行おこなわれること。