Multibot scheduling based on number of records in a file

If I have more than 200 records to records to process, I want to trigger queue on 2 machines. If more than 600, I want to schedule it on 3 machines. But If its less than 200, I want to schedule it just on 1 machine.

I can do it by triggering thr Bot manually, but how to achieve it with scheduling.

Thanks in advance for helping me out