ころ・頃・比koro[1]atamadaka (head-high)

1. noun, adverb, noun (suffix)(approximate) time; around; about; towardごろ when used as a suffix
   大抵たいていの晩餐ばんさんは１１時じ頃ころに終おわります。↗

   Most dinner parties break up about eleven o'clock.
2. noun, adverb, noun (suffix)suitable time (or condition)
   あなたは結婚けっこんしてもよいころだ。↗

   It's about time you got married.
3. noun, adverb, noun (suffix)time of year; season
   彼女かのじょは夏頃なつごろから病気びょうきだった。↗

   She has been ill since about summer.

• Synonym時ときNeutralThe most general word for a time or when something happens, as in 「子供の時」; 頃 covers rough periods, follows clock times as 'around', and also marks a suitable time.
• Synonym折おりWrittenA specific occasion or juncture, as in 「上京の折に」「折を見て」; written in tone, unlike the rough time span of 頃.
• Synonym潮時しおどきNeutralThe right moment to do something, often to quit or bow out, as in 「引退の潮時」; it stresses timing rather than a rough period.
• Synonym時期じきNeutralA defined stretch of time or season, as in 「この時期は忙しい」; more formal than 頃, with clearer boundaries.
• Synonym時機じきWrittenThe opportune moment to act, as in 「時機を逸する」; written in tone. 頃 is mainly a rough time, with the 'right time' sense seen in words like 「食べ頃」.
• Synonym時分じぶんNeutralA time of life or season, as in 「若い時分」; a bit more old-fashioned than 頃, and also used for times such as mealtimes.
• Synonym時節じせつWrittenA season, the times, or the way things are, as in 「時節柄」; frequent in letter greetings, and more formal than the colloquial 頃.

Use 「頃」 for an approximate time or 'around' a clock time, 「時」 for time in general, and 「時期」 for a defined period. For the right moment to act pick 「潮時」 or 「時機」; 「時節」 suits seasons and letter greetings.

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

1. （ころ）おおまかな時とき、時期じき。
2. 系けいの質量しつりょうの大おおきさによって変かわる性質せいしつがある物理量ぶつりりょうの名称めいしょうに付つけて、単位たんい質量しつりょう当あたりの物理量ぶつりりょうであること示しめす。
3. フィリピンを意味いみする語ごを作つくる。