How many letters does the top answer for “a friend who is frequently in the company of another” have?

The most common answer is companion (9 letters).

Crossword clue: a friend who is frequently in the company of another

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

companion 9 letters wn-def

a friend who is frequently in the company of another

comrade 7 letters wn-def

a friend who is frequently in the company of another

another word for company 50% similar → companion