periodicity
n. பருவ நிகழ்வு, இடையீட்டொழுங்கு, விரைவதிர்வு.
Pe`ri*o*dic"i*ty, n.; pl. Periodicities. Etym: [Cf. F. périodicité.] Defn: The quality or state of being periodical, or regularly recurrent; as, the periodicity in the vital phenomena of plants. Henfrey.