expedience vs self-seeking

expedience

noun
  • The quality of being fit or suitable to cause some desired end or the purpose intended; propriety or advisability under the particular circumstances of a case. 

  • Something that is expedient. 

  • Speed, haste or urgency. 

self-seeking

noun
  • The selfish promotion of one's own interests. 

adj
  • Mindful of, or promoting, only one's own interests. 

  • That searches for a target automatically. 

How often have the words expedience and self-seeking occurred in a corpus of books? (source: Google Ngram Viewer )