mobility vs passing

mobility

noun
  • People's ability to move between different social levels or professional occupations. 

  • A tendency to sudden change; mutability, changeableness. 

  • The degree to which particles of a liquid or gas are in movement. 

  • The ability of a military unit to move or be transported to a new position. 

  • The ability to move; capacity for movement. 

passing

noun
  • The ability of a person to be regarded as a member of an identity group or category different from their own. 

  • The act of passing a ball etc. to another player. 

  • A form of juggling where several people pass props between each other, usually clubs or rings. 

  • The fact of going past; a movement from one place to another or a change from one state to another. 

  • Death, dying; the end of something. 

  • The act of approving a bill etc. 

adj
  • Vague, cursory. 

  • Going past. 

  • That passes away; ephemeral. 

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