Lewis & Short

2. perfrictĭo, ōnis, f. [perfrico], a rubbing, abrasion (post-Aug.), Veg. 1, 35, 1; 1, 38, 3.
Plur.: perfrictionibus cum oleo mederi, Plin. 21, 18, 69, § 116 (but perh. the same word as the preced. in the same meaning).