dogface vs ground pounder

dogface

noun
  • A foot soldier, especially during World War II. 

  • Either of two pierid butterflies of the New World genus Zerene. 

  • An ugly person. 

ground pounder

noun
  • A military soldier whose primary role is infantry or the use of ground-based materiel. 

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