The title pretty much summarizes my question. For example, in the following sentence
She has developed an accent while living overseas, which as of late(ly) became more pronounced.
I usually hear people say either as of recently or as of late, and one of those is bound to be grammatically incorrect. Or is it?
“Lately” and “as of late” are synonyms. You would not combine them in the form “as of lately”. It’s worth remembering that “as of late” is a formulaic construction that doesn’t allow just any old adverb of time to be substituted. As of now, as of then, as of six o’clock — all these are acceptable time expressions.
As for usage, I don’t like to go to the NGrams viewer, but it definitely shows that “as of lately” flatlines in comparison to “as of late”.