136. Frequency -- N. frequency, oftness , oftenness , commonness; repetition &c 104; normality &c 80; example (conformity) 82; routine, custom (habit) 613.
138. Periodicity [Regularity of recurrence] -- N. periodicity, intermittence; beat; oscillation &c 314; pulse, pulsation; rhythm; alternation, alternateness, alternativeness, alternity .
139. Irregularity of recurrence -- N. irregularity, uncertainty, unpunctuality; fitfulness &c adj.; capriciousness, ecrhythmus .