commonality vs working class

commonality

noun
  • The common people; the commonalty 

  • Such a shared attribute or characteristic 

  • A quality that applies to materiel or systems: (a) possessing like and interchangeable parts or characteristics enabling each to be utilized, or operated and maintained in common; (b) having interchangeable repair parts and/or components; (c) applying to consumable items interchangeably equivalent without adjustment. 

  • The joint possession of a set of attributes or characteristics. 

working class

noun
  • The social class of those who perform physical work for a living, as opposed to the professional or middle class, the upper class, or others. 

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