at that vs except

at that

prep
  • Thereupon; directly after, and as a result of, that. 

  • Now that it has been mentioned. 

  • In addition to what has been said; furthermore; moreover. 

except

prep
  • with the exception of; but. 

conj
  • With the exception (that); used to introduce a clause, phrase or adverb forming an exception or qualification to something previously stated. 

verb
  • To exclude; to specify as being an exception. 

  • To take exception, to object (to or against). 

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