at some point in the past; at some stage
Used to refer to an unspecified time in the past when something began or changed, often with a sense of vagueness or nostalgia.
At some point, he started jogging every morning.
At some stage, I came to want to live in this town.
Standard kanji-kana mixed spelling; the most natural written form.
Full kanji spelling using 何時 for いつ; rarely used and may be confused with なんじ.
A fixed phrase composed of いつ (when), の (possessive particle), 頃 (approximate time), から (from), and か (question marker), literally 'from around when?', used idiomatically to mean 'at some point in the past'.