the easiest way to store male pollen is to collect it of course (i use plain white printer paper) put it in a sunny or warm location to nsure all of the moisture is gone, and then collect it on Q tips. put the q tips in a seal a meal bag, and vaccum all of the air out. stores just fine in the fridge for up to 6 months easy. if your storing it from an indoor grow during the winter months, you can out it in a garage,shop,ect. anyplace cool works fine
no need to freeze it, just keep it cool