oftenest

adv

1. (dated, form-of, superlative)superlative form of often: most often

   “Brother Samson Subsacrista, one remarks, is ready oftenest with some question, some suggestion, that has wisdom in it.”

   “1930, Edgar Rice Burroughs, Tarzan the Invincible,Chapter 8, The Treachery of Abu Batn, Each hour La learned new words, all nouns at first, that described each familiar object that appeared oftenest to their view.”