"Major deviation" refers to a significant or noticeable departure from a particular path, plan, or expected outcome. It suggests a significant change or shift from the normal or desired course of action or behavior. Full definition
The only major deviations from the norm were in the number of listings for residential properties, where listings were up over the ten - year average. (rahb.ca)
If you se major deviations between the two, you should start investing further to find out what is causing those deviations. (edgewonk.com)
But other critics singled out the sharply observed characters, the cynical but humorous tone, the gritty and scary atmosphere, and the overall and the originality of a film that major deviations in spirit still remained faithful to the enduring fairytale. (emanuellevy.com)