This is another question about my molecule; as I'm not doing this as an academical affiliate(I'm currently majoring in mathematics), I have only NWChem and my personal laptop on the mix, and thus need to save time and/or CPU usage.
I noticed, already on the WebMO demo server, that DFT calculations on elements no larger than Ar often fail at the 45-second CPU time limit (de jure 30, de facto 45) on said server if they contain f functions in their basis sets.
WebMO Basic and NWChem are both free without any official CPU time limits- the problem is that I use my laptop to code things (that are completely irrelevant to computational chemistry) already and thus do not want to "torture" my laptop unnecessarily more.
I mentioned f (polarisation) functions on both the title and the body of the question- the desired question and its reasons are now clear.
UPDATE: My question was originally about freezing f-functions from the TZ basis set ONLY in the MP2 part of the calculations; i.e. doing a full TZ H-F calculation AND THEN freezing the virtual f-functions in the forecoming MP2 calculation(See MP2 page in the NWChem manual to see what I'm talking about). The question somehow got changed to something entirely different so I'm adding this here for more clarity.