:::::::: I think you're over-using ngrams, which are not selective on reliability of sources, and are over-selective for published sources versus everyday usage (e.g. shops, menus, online recipes, ...). "Currently predominates in published material" is not quite the same as "usually". Ngrams are useful, for example, to prove existence and notability, but once again it needs to be said that we should rely on good dictionaries, since lexicographers do research usage. By the way, I made that suggestion not to make any assertions of my own, but to help us to avoid making a too-strong statement about regional and temporal variations that we probably can't reliably source.