I have seen this In many a TV Show and Movie. But did this actually happen often? (Sorry if this was asked before)
Not to discourage further discussion, but you might like these previous answers:
Was there ever actually a “right to trial by combat”? If so, when, where, and how was that right invoked and administered? by u/mikedash
Is a trial by combat as seen in Game of Thrones a real thing? by u/Georgy_K_Zhukov
Were their professional duelists hired for Trials by Combat? also by Georgy