Money
To go from being poor to having a lot of money is to go from "____ to riches."
Someone who is enduring something difficult is going through a ____ time.
What is hard or tough?
A person who is humble and practical is "down to _____."
"Time ____ when you're having fun."
What is flies?
If you have 3 hours before your next appointment, you may go for a long walk to "____ time."