dropping vs earthward

dropping

noun

  • The act of something that drops or falls. 

  • Something dropped; a droplet. 

  • A piece of animal excrement; dung. 

earthward

adj

  • Towards or in the direction of the Earth. 

adv

  • Towards or in the direction of the Earth. 

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