くらい ①・ごろ: the difference
くらい ①N5
Meaning
About, Approximately
Past papers
Tested 4 times in past papers
Example
何時ぐらいに来ますか。
Approximately when will you come?
ごろN4
Meaning
Around, About
Past papers
Example
８時頃に帰りました。
I went home around eight o'clock.
How to tell them apart
「くらい」 vs 「ごろ」 is a favourite N5 point:
「くらい」 goes with lengths of time and amounts: 3時間くらい (about three hours), 5日間くらい (about five days).
「ごろ」 goes only with a point in time: 3時ごろ (around three o'clock), 5月ごろ (around May).
Never 「3時間ごろ」 or 「5人ごろ」.