Lewis & Short

frīguscŭlum, i, n. dim. [frigus], slight cold (post-class.).

  1. I. Lit., Tert. de Anim. 25.
  2. II. Trop., coolness, variance, disagreement between man and wife: quid si divortium non intercesserit, sed frigusculum? profecto valebit donatio, si frigusculum quievit, Dig. 24, 1, 32, § 12 (al. fribusculum).