infrequency

Từ điển WordNet v3.1 - WordNet Dictionary

noun

noteworthy scarcity
• Syn:
rarity, rareness
• Derivationally related forms:
infrequent, rare (for: rareness), rare (for: rarity)
• Hypernyms:
scarcity, scarceness

• Từ đồng nghĩa / Synonyms:
  rarity, rareness