dragger vs dragster

dragger

noun

  • One who takes part in drag racing. 

  • A vehicle used in drag racing. 

  • A car thief. 

  • A trawler. 

  • Something that drags. 

dragster

noun

  • One who takes part in drag racing. 

  • A drag queen. 

  • A heavily modified or custom-built vehicle used in drag racing. 

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