Here's a little sample of my method for anyone who cares
My collection of pollens not yet frozen
A Dixie cup with cultivar name and date pollen collected.
Most pollen I collect is fresh to the day. Sometimes unopened. Sometimes I take anthers on day 2 but I really want as much pollen as I can get. I also don't want any contamination from the bugs.
They stay in the Dixie cups for 4-7 days (out of laziness I've also left them out for 10 days) and then get frozen in a coin envelope and labeled. If I need to use the pollen that's frozen I open the envelope while still in the freezer and get some with my paint brush or q-tip and put it back it the freezer saw it is not constantly thawed and frozen.