put down to

put (something) down to (something else)

To regard a situation, action, or outcome as being the result of some specific aspect, condition, or event. The runner put her leg pain down to simple muscle fatigue, but she was shocked to learn that it was due to deep vein thrombosis. I put most of my success down to the excellent teaching I received in secondary school.
See also: down, put

put something down to something

 and set something down to something
to explain something as being caused by something else. I put his bad humor down to his illness. We set your failure down to your emotional upset.
See also: down, put
References in classic literature ?
A poem of the satirical kind cannot indeed be put down to any author earlier than Homer; though many such writers probably there were.
Two horses weren't killed, they were put down to save them from further suffering.
Due to the severe injuries the creamy brown-coloured animal sustained, the RSPCA said it was put down to end its "unbearable suffering".
Our house is now much admired by our friends, a fact that my wife puts down to its stylishness, and that I put down to their politeness - Harry Enfield.
5 hectare olivene-phlogopite lamproite pipe (X273) also produced one clear-translucent macrodiamond from the first drill hole put down to test this target.