How many letters does the top answer for “of or relating to a diastole or happening during a diastole” have?

The most common answer is diastolic (9 letters).

Crossword clue: of or relating to a diastole or happening during a diastole

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

diastolic 9 letters wn-def

of or relating to a diastole or happening during a diastole