mossback vs pullback

mossback

noun
  • Synonym of mossyback (“a person with old-fashioned views; hence, one who is very conservative or reactionary”) 

  • The largemouth bass or moss bass (Micropterus salmoides). 

  • Synonym of mossyback (“a fish that is large and old, especially one that has algae growing on its back”) 

  • A person who stayed hidden to evade conscription (especially by the Confederate States Army) during the American Civil War (1861–1865); a mossyback. 

  • A turtle that, because of its age, has a growth of algae on its back 

  • The common snapping turtle (Chelydra serpentina). 

pullback

noun
  • That which holds back, or causes to recede; a drawback; a hindrance. 

  • A device for making a woman's gown hang close and straight in front. 

  • The map between cotangent bundles of manifolds corresponding to a smooth map between smooth manifolds, which at each point is the dual map to the corresponding pushforward. 

  • The act or result of pulling back; a withdrawal. 

  • The iron hook fixed to a casement to pull it shut, or to hold it partly open at a fixed point. 

  • The act of drawing a camera back to broaden the visible scene. 

  • Within a Cartesian square (which has a pair of divergent morphisms and a pair of convergent morphisms) the divergent morphism which is directly opposite to a given one of the convergent morphisms, said to be “along” the convergent morphism which is between that pair of opposite morphisms. (The pullback is said to be “of” the given morphism.) 

  • An attacking pass from the wing into a position further from the attacking goal line. 

  • A reduction in the price of a financial instrument after reaching a peak 

  • The limit of a cospan: a Cartesian square or “pullback square”. 

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