self-absorption vs soul-searching

self-absorption

noun
  • Preoccupation with oneself to the exclusion of everything else. 

soul-searching

noun
  • Probing introspection; a critical consideration of one's conscience; also, an instance of such consideration. 

adj
  • Involving probing introspection, or a critical consideration of one's conscience, especially motives and values. 

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