greet vs run up against

greet

verb
  • To be perceived by (somebody). 

  • To welcome in a friendly manner, either in person or through another means such as writing. 

  • To arrive at or reach, or meet. 

  • To accost; to address. 

  • To weep; to cry. 

adj
  • Great. 

run up against

verb
  • To begin to encounter problems with (someone or something). 

How often have the words greet and run up against occurred in a corpus of books? (source: Google Ngram Viewer )