an vs out of

an

prep
  • In each; to or for each; per. 

noun
  • The first letter of the Georgian alphabet, ა (Mkhedruli), Ⴀ (Asomtavruli) or ⴀ (Nuskhuri). 

num
  • one 

article
  • Used before one and words with initial u, eu. 

  • Used before a vowel sound. 

  • Used before all consonants. 

  • Used before /h/ in an unstressed syllable. 

  • Used before /h/ in a stressed syllable. 

out of

prep
  • In. 

  • So as no longer to be in a given condition or state. 

  • Taken from among; expressing a fraction of (a larger number). 

  • Born from a given mother (cf. by). 

  • Not within a given space, area etc. 

  • From a thing or or place as a source, place of origin etc. 

  • From the inside to the outside of. 

  • Stating the port in which a boat has been registered. 

  • Not in (a given state, condition). 

  • Without; no longer in possession of. 

  • From a given cause or motivation. 

  • From a given material as means of construction. 

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