不知凡几bù zhī fán jǐ

not know (/can not tell)how many there are;there are countless similar cases; innumerable; numerous
❍ 公莅任，历稽旧案，状中称死者不下百余，其千里无主者，更～。(《聊斋志异·老龙舡户》1610) Thus,when His Excellency entered upon his duties,he found more than a hundred plaints of the kind,besides innumerable cases in which the missing man’s relatives lived at a distance and had no instituted proceedings.
❍ 吾人亲目所见，～矣。(鲁迅《中国小说史略》260) I have seen many such officials with my own eyes；…

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