porker vs salad dodger

porker

noun
  • An obese person. 

  • A lie. 

  • A police officer. 

  • A pig, especially a castrated male, being fattened and raised for slaughter. 

salad dodger

noun
  • An overweight person. 

  • One who does not normally eat salad. 

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