rubber duck vs skiff

rubber duck

noun
  • An inflatable boat. 

  • A toy, made from rubber or rubber-like plastic, shaped like a duck; usually a floating bathtub toy. 

verb
  • To act as a sounding board for a programmer that is debugging their code, facilitating rubber duck debugging. 

skiff

noun
  • A small flat-bottomed open boat with a pointed bow and square stern. 

  • Any of various types of boats small enough for sailing or rowing by one person. 

  • A light, fleeting shower of rain or snow, or gust of wind, etc. 

  • A (typically light) dusting of snow or ice (or dust, etc) (on ground, water, trees, etc). 

  • An act of slightly pruning tea bushes, placing new leaves at a convenient height without removing much woody growth. 

verb
  • To fall lightly or briefly, and lightly cover the ground (etc). 

  • To navigate in a skiff. 

  • To cut (a tea bush) to maintain the plucking table. 

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