。
I love throwing parties all the time.
Literal
Frequently parties [object-を] hosting [nominalizer-の] [subject-が] greatly-love.
頻繁に is a somewhat formal adverb meaning 'frequently.' パーティーを開く ('to hold/throw a party') is nominalized by の and marked with が as the object of 好き — since 好き is an adjective, its object takes が rather than を. 大好き is the emphatic form of 好き.