Alright lets see if i understand this correctly.
You have some fresh and frozen material that you aggitated in a bucket with ice and water for some time then ran evwrything through a collecting bag (the 240) then poured the water in the 75 micron bag collecting about a gram of hash ..... then you tried to aggitate the material again and run the water theough the 120 micron bag. Here in this step you didnt get any and you're wondering why. Is this correct?
If this is the case, the its because you probably extracted most of the bigger trichomes using the 75 micron bag (smaller mesh). And now when you tried to run it in the larger micron (larger mesh) you didnt capture anything ... its likely that you still had some more trichomes but were smaller and that after aggitation and running through the 120 micron screen they just went throufh the mesh.
Does this help at all?
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:
https://www.rollitup.org/index.php?threads/916619/
and my previous TriStrain grow

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https://www.rollitup.org/index.php?threads/883569/