plimsoll vs slipper

plimsoll

noun
  • A rubber-soled lace-up canvas shoe for sports or onboard ships; a precursor of trainers. 

  • The plimsoll symbol ⦵ (or o) that is used as a superscript in the notation of thermodynamics to indicate an arbitrarily chosen non-zero reference point. 

slipper

noun
  • Such a shoe intended for indoor use; a bedroom or house slipper. 

  • A low soft shoe that can be slipped on and off easily. 

  • The plimsoll or gym shoe used in this form of punishment. 

  • A kind of bedpan urinal shaped like a shoe. 

  • A kind of brake or shoe for a wagon wheel. 

  • A person who slips. 

  • A piece, usually a plate, applied to a sliding piece, to receive wear and permit adjustment; a gib. 

  • A kind of apron or pinafore for children. 

  • A form of corporal punishment where the buttocks are repeatedly struck with a plimsoll; "the slipper". 

  • A flip-flop (type of rubber sandal). 

verb
  • To spank with a plimsoll as corporal punishment. 

How often have the words plimsoll and slipper occurred in a corpus of books? (source: Google Ngram Viewer )