A stroke of fortune noun phrase
Said when luck or good things intentionally occur.
By a stroke of luck, I didn't miss the train although it was too was late.
My sister also had a stroke of fortune when my boss helped her with her business.
If our project succeeds, it will be a stroke of fortune.
To be thankful or grateful for one's good luck usually while avoiding a bad situation
A normally unreliable person can still be right about something, even if it is only by accident.
It is used to say that someone is lucky.
Relying on guessing and luck
The origin of this expression is not clear.