"In a timely manner" is an idiom. If something is finished quickly, on time, or without wasting any time, then it has been done "in a timely manner". This phrase is not commonly used anymore. Most of the time people will say "on time".

What does in a timely manner mean?

If something is finished quickly or on time, then it's been done in a timely manner. Homework, thank-you notes, and your taxes are just a few things that you should complete in a timely manner.

How long is a timely manner?

Timely Manner means a period of thirty days, unless this period is short- ened by the existence of an emergency.