'frequently-noted' originates from English as a compound of 'frequently' and 'noted'; 'frequent' ultimately comes from Latin 'frequens' where 'frequens' meant 'crowded; repeated/often', and 'noted' comes from Latin 'nota' where 'nota' meant 'mark; sign; note'.

'frequens' developed via Old French into Middle English forms of 'frequent' and the adverb 'frequently'; 'nota' became Old French 'note' and Middle English 'note', leading to the participial adjective 'noted'. These combined in modern English to form the hyphenated compound 'frequently-noted'.

Initially, it conveyed the literal sense of something 'often observed or mentioned', and this sense has remained stable in modern usage.