From Longman Dictionary of Contemporary Englishsomething presents itselfsomething presents itselfHAPPENif a situation, opportunity etc presents itself, it suddenly happens or exists I’ll tell her as soon as the opportunity presents itself. → present
Examples from the Corpus
opportunity presents itself• When an attractive opportunity presents itself then action follows.• But sometimes the opportunity presents itself to be with a student in a situation that has nothing to do with schoolwork. 