coping vs roof

coping

noun
  • The top layer of a brick wall, especially one that slopes in order to throw off water. 

  • Clipping the beak or talons of a bird. 

  • The process of managing taxing circumstances, expending effort to solve personal and interpersonal problems, and seeking to master, minimize, reduce or tolerate stress or conflict. 

roof

noun
  • An overhanging rock wall. 

  • The external covering at the top of a building. 

  • The top external level of a building. 

  • The upper part of a cavity. 

  • The surface or bed of rock immediately overlying a bed of coal or a flat vein. 

verb
  • To cover or furnish with a roof. 

  • To traverse buildings by walking or climbing across their roofs. 

  • To put into prison, to bird. 

  • To shelter as if under a roof. 

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