The word Oftennes is misspelled against Oftenness, a noun meaning "Frequency."
-->
Oftenness has double 'ss' in the end mispronounced as 's'
Remember double 'SS' appears in the end of this word which should not be misspelled with single 'S'
Wrong Spelling:  oftenne-s 
Correct Spelling:  oftenne-ss 
Explore spell check of Oftenness to spell without errors.