analeptic vs strengthener

analeptic

adj
  • Of or relating to analepsis (a form of flashback). 

  • That restores or stimulates health. 

noun
  • A restorative or stimulative medication, especially one used to overcome depression. 

strengthener

noun
  • One who, or that which, gives or adds strength. 

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