How is 'a good variety of food' to be understood in the sentence 'If you want to cook for yourself, the shop in the next village has a good variety of food'? Is 'a good variety of' a fixed collocation? In this example, what is the difference if 'a good variety of' is changed to 'a large variety of' or 'a wide variety of'? Are they roughly equivalent and interchangeable? Thank you so much！