Thank you for the workflow!
It’s so useful and easy to understand.
I think, I found a little mistake in the “Configure the results of choice” component.
I typed the Number of occurrence = N (“Ioccurence-input”). And the MMPs with Number of occurrence = N were filtered out. So, I get MMPs only with (N+1). (For example, I needed MMPs with 5 numbers of pairs but get MMPs with 5+1=6 numbers.)
I found the reason in “Rule-Based Row Filter” node, the first node located in “Configure the results of choice” component:
Rule: $Number of occurences$ > $${Ioccurence-input}$$ => TRUE
Transformed rule: $Number of occurences$ >= $${Ioccurence-input}$$ => TRUE
But may be, it’s my misunderstanding 
Best regards,
Maks