etc. etc. usage [closed]
Two or even three "et cetera"s in a row are idiomatic and reasonably common, but informal. Multiple "et cetera"s can be used to emphasize the great number of omitted items or the speaker's feelings about them. A more familiar example of duplicating words for emphasis is "it was really, really good", which means the same thing as "it was really good", but expresses greater intensity.