didactic vs pedagogical

didactic

adj
  • Teaching from textbooks rather than laboratory demonstration and clinical application. 

  • Instructive or intended to teach or demonstrate, especially with regard to morality. 

  • Excessively moralizing. 

pedagogical

adj
  • Of, or relating to pedagogy; teaching. 

  • Haughty and formal. 

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