"Stubborn persistence" means having a determined and unwavering attitude to keep trying and not giving up, even when faced with challenges or obstacles. Full definition
Months later, and with much stubborn persistence, I was able to take my baby off of the formula, and continue nursing. (boba.com)
Gifted with more stubborn persistence than athletic ability, the bespectacled, awkward Eddie «The Eagle» Edwards is smitten from a young age with the idea of becoming an Olympic athlete, much to the frustration of his working - class parents. (digitaltrends.com)
His stubborn persistence and vision made Uber what it is. (fortune.com)