I ran the following script:

BTN opens and gets 3bet by the SB to and calls.
SB range: 55+, A2s+, K9s+, Q9s+, J9s+, T9s, 98s, 87s, 76s, 65s, ATo+, KJo+
BTN range: 100% - 55-TT, A9s-AQs, KTs+, QTs+, J9s+, T8s+, 87s, 76s, 65s| 50% - 22-44, A2s-A8s, K7s-K9s, Q9s, 86s, 75s, 64s, 54s, AJo, KQo

Pot is 235 the rake is 4% capped at 24 chips (not sure why it's relevant).

The whole tree is attached

And here is the report for some high EV flops

So we see that even when OOP has the highest EV (157.093), he is betting only 95.1%, but he is betting 98.52% with far less EV in the pot (146.848 on K44r). So now I know that even if higher EV means High frequency betting than lower EV, when EVs are close there are other factors that determine the accurate betting and checking frequencies.

Can anyone point to the right direction here - I am a bit lost.

Thanks in advance