read out vs read out loud

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. 

read out loud

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