latent vs prepatent

latent

adj
  • Lying dormant or hidden until circumstances are suitable for development or manifestation. 

  • Remaining in an inactive or hidden phase; dormant. 

  • Existing or present but concealed or inactive. 

noun
  • Anything that is latent. 

  • The residue left by a person's finger that can be made visible by a process such as powder dusting; a latent fingerprint. 

  • An underlying cause that can be inferred from statistical correlations; factor. 

prepatent

adj
  • Before symptoms (especially of infection) become manifest. 

  • Prior to the existence of a legal patent. 

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