pulsation rates for specific frequencies

How do I specify specific pulsation rates for specific pure tones? Is that possilbe?

What do you mean by “pulsation rates”?
What are you trying to do?

Thx for responding Steve. Here is what I mean: say you have a pure tone of 440Hz for just 60 sec. I want to pulse it at certain fractions for that 60 sec. e.g. I want to pulse the tone every 1.5 sec., then say 1.3 sec then 1.125 sec. I might want to pulse the tone each 20 sec. every 1.5 sec., then pulse it every 1.3 sec. for 20 sec etc. I hope this clarifies what I want to do.

You could do that “manually” with the “Envelope Tool”: https://manual.audacityteam.org/man/envelope_tool.html