“Anyone” vs. “Any One”: What’s the Difference?

The difference between “anyone” and “any one”

• "Anyone" is used to refer to people in general, while "any one" is used to refer to specific individuals or objects.
• "Anyone" is a synonym for "anybody," while this is not the case for "any one."
• "Anyone" is often used for open-ended statements, while "any one" is used to make specific choices or selections from a group of options.

What is the definition of “anyone” and “any one”?

Which is the more popular variant on the Internet?