hydrographic vs maritime

hydrographic

adj
  • Of or pertaining to hydrography. 

maritime

adj
  • Of or relating to a sailor or seaman; nautical. 

  • Inhabiting the seashore; living coastwise; littoral. (distinguished from marine) 

  • Bordering on the sea; living near the seacoast; coastal. 

  • Relating to or connected with the sea or its uses (as navigation, commerce, etc.). 

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