Most often (superlative form of oft: most oft.), (chiefly poetic and dialectal)(adverb)
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Use "oftest" in a sentence
"Her oftest gossipings are sabbath-day's journeys, where, (though an enemy to superstition,) she will go in pilgrimage five mile to a silenced minister, when there is a better sermon in her own parish."
"Their pastime or recreation is prayers, their exercise drinking, yet herein so religiously addicted that they serve God oftest when they are drunk."
"QUOTATION: Rocks whereon greatest men have oftest wreckd."