analysis vs investigation

analysis

noun
  • Psychoanalysis. 

  • The mathematical study of functions, sequences, series, limits, derivatives and integrals. 

  • Decomposition into components in order to study (a complex thing, concept, theory etc.). 

  • The result of such a process. 

  • Proof by deduction from known truths. 

  • The process of breaking down a substance into its constituent parts, or the result of this process. 

  • The analytical study of melodies, harmonies, sequences, repetitions, variations, quotations, juxtapositions, and surprises. 

investigation

noun
  • The act of investigating; the process of inquiring into or following up; research, especially patient or thorough inquiry or examination 

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