runt of the litter vs wuss

runt of the litter

noun

  • the smallest and weakest person in a group, especially a group of siblings 

wuss

noun

  • A weak, ineffectual, cowardly, or timid person. 

verb

  • Only used in wuss out 

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