read out vs say aloud

read out

verb
  • To read something and say the words to inform other people. 

  • (of a device) To read some data and inform the person using the device. 

  • To interpret a part of a law so that it is not struck down but is rendered of no effect or applicability. 

say aloud

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