“I'll call you next week and we can settle on the time and place.”

You're planning to meet a woman who you met on an online dating site. You've e-mailed each other and decided to meet next Wednesday, but you haven't picked the time or location. You say:

I'll call you next week and we can settle on the time and place.

settle on (something)

To "settle on" something means to finally make a decision after considering lots of different choices. You use "settle on ___" to talk about the topic you're deciding:

Have you settled on where you're going for your honeymoon?

Or you can also use it to talk about which one you chose:

We settled on Bali for our honeymoon.

In the U.S., it's common for people to make a general plan to meet people on a certain day or weekend, and then to choose the specifics later.

"Settle on ___" is OK to use in written or spoken English.

time and place

"Time and place" is a common group of words to use together. You can also say "place and time".