What literary technique is exemplified by the recurrent phrase "there had never been a time when"?

The recurrent phrase "there had never been a time when" is an example of repetition, which is a literary technique that involves the deliberate use of the same word or phrase multiple times throughout a text. This technique emphasizes the importance of the idea or emotion being conveyed and can create a rhythm or pattern that enhances the overall impact of the writing. In this case, the repetition can emphasize a sense of timelessness or continuity, reinforcing the speaker's feelings or experiences.

Other techniques, such as metaphor and simile, involve comparisons to illustrate ideas but do not focus on the repetition of a particular phrase. Alliteration, which involves the repetition of initial consonant sounds in closely placed words, is another distinct literary device that does not apply in this instance. Thus, repetition is the most fitting answer as it captures the essence of the usage in the phrase provided.