forethought vs soul-searching

forethought

noun
  • Thinking beforehand or in advance, planning; prior or previous consideration; premeditation. 

  • Anticipation. 

  • Provident care; prudence. 

adj
  • Thought of, or planned, beforehand. 

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 forethought and soul-searching occurred in a corpus of books? (source: Google Ngram Viewer )