How many letters does the top answer for “of or occurring or payable every month” have?

The most common answer is monthly (7 letters).

Crossword clue: of or occurring or payable every month

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

monthly 7 letters wn-def

a periodical that is published every month (or 12 issues per year)

occurring every hour or payable by the hour 60% similar → hourly

occurring every two months 60% similar → bimonthly

occurring or payable every year 60% similar → yearly