我已经记不清她迟到多少次了。

I've ___lost ___count of how many times she's been late.

我在一家制药公司工作时，这句话我听了多少次都记不清了。

I ___lost ___count of how often I heard this sentence when I worked for a drug company.

数了这么多星星后，他开始记不清数目了。

After counting so many stars, he began to ___lose ___count.