coping vs stratum

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. 

stratum

noun
  • A layer of sedimentary rock having approximately the same composition throughout. 

  • One of several parallel horizontal layers of material arranged one on top of another. 

  • Any of the regions of the atmosphere, such as the stratosphere, that occur as layers. 

  • A class of society composed of people with similar social, cultural, or economic status. 

  • A layer of vegetation, usually of similar height. 

  • The level of accuracy of a computer's clock, relative to others on the network. 

  • A layer of tissue. 

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