Where does “oftness” come from?

oftness (English) comes from English oft, from Middle English oft, from Old English oft, from Old High German oftu, from Proto-Germanic uftō — oft; often.

oftness (English): The quality of happening often; frequency

Definitions

  1. The quality of happening often; frequency

Ancestry of “oftness”, step by step

oftness traces back through two separate lines of ancestry.

via English oft

StepLanguageWordMeaning
1Englishoftoften; frequently; not rarely
2Middle Englishoft
3Old Englishoftoften
4Old High Germanoftu
5Proto-Germanicuftōoft; often

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Germanic uftō