Looking on the internet deeply has found these results:

when it comestime to is the most popular phrase on the web.

when it came time to 1617,000 results on the web	when it comestime to 11,620,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I never would've believed that my friend and commanding officer would go soft when it came time to do his duty. But when it came time to divide up the assets, he claimed it was lost. But it just stands to reason... when it came time to cash in your chips... this old diseased maniac would be your banker. And when it came time to return to them... he chose to stay with us instead. (man) And when it came time to call it a night, they pulled the old "I'll leave first" play. But when it came time to leave, we couldn't find Nicky. But when it came time to do our album covers, they suggested that we use Gary Burden and Henry Diltz. And when it came time to unleash black cyper on them, she couldn't do it.	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

when it came time to

1617,000 results on the web

when it comestime to

11,620,000 results on the web

More popular!

I never would've believed that my friend and commanding officer would go soft when it came time to do his duty.
But when it came time to divide up the assets, he claimed it was lost.
But it just stands to reason... when it came time to cash in your chips... this old diseased maniac would be your banker.
And when it came time to return to them... he chose to stay with us instead.
(man) And when it came time to call it a night, they pulled the old "I'll leave first" play.
But when it came time to leave, we couldn't find Nicky.
But when it came time to do our album covers, they suggested that we use Gary Burden and Henry Diltz.
And when it came time to unleash black cyper on them, she couldn't do it.

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.