Now that the chance had come it was probably too late; the old man was gone, leaving an unwelcome legacy.
Lewis, Roy A TROUT IN THE MILK
All related terms of 'come it'
come off it!
stop trying to fool me!
come and get it!
the meal is ready !
come to think of it
You use the expression come to think of it to indicate that you have suddenly realized something, often something obvious .
when you come/it comes down to it
You can use the expression when it comes down to it or when you come down to it for emphasis , when you are giving a general statement or conclusion .
come to think of it/when you think about it
You use expressions such as come to think of it , when you think about it , or thinking about it , when you mention something that you have suddenly remembered or realized .
someone will cross that bridge when they come to it
said to mean that someone intends to deal with a problem when, or if, it happens , rather than worrying about the possibility of it happening