我已经数不清她迟到了多少次。

I've ___lost ___count of the number of times she's arrived late.

我在一家制药公司工作时，都数不清听到这句话多少次了。

I ___lost ___count of how often I heard this sentence when I used to work for a drug company.

他已经数不清在隔离中度过了多少天。

He had ___lost ___count of the days spent in isolation.