频繁 (pínfán) means 'frequent' or 'frequently' and describes something that occurs repeatedly in a short period of time. Though composed of two characters — 频 (pín), meaning 'frequency' or 'repetition', and 繁 (fán), meaning 'numerous' or 'prolific' — together they form a compound adjective/adverb emphasizing high recurrence, not just quantity. It’s commonly used to describe actions, events, or behaviors that happen too often or more than expected.

This word carries a neutral-to-slightly-negative connotation depending on context: it may simply state frequency ('The train arrives frequently'), but often implies excess or inconvenience ('He checks his phone too frequently'). It typically modifies verbs (as an adverb) or nouns (as an adjective before a noun, e.g., 频繁的打扰), and is more formal or written than colloquial alternatives like 经常. It’s especially common in discussions about habits, communication, health symptoms, or system operations.