長期間(ちょうきかん)

長(ちょう) (long) + 期間(きかん) (period of time). Describes a stretch of time that is notably longer than usual, typically ranging from several weeks to years.

Common collocations

• 長期間(ちょうきかん)にわたる — over a long period
• 長期間(ちょうきかん)放置(ほうち)する — leave unattended for a long time
• 長期間(ちょうきかん)保存(ほぞん)する — store for a long period
• 長期間(ちょうきかん)滞在(たいざい)する — stay for an extended period

Similar words

• 長期(ちょうき) — long-term; focuses on the nature of something rather than the duration itself
• 長い間(ながいあいだ) — for a long time; more colloquial and conversational
• 長年(ながねん) — many years; specifically implies years rather than a general long period