Kenneth G. Wilson (1923–). The Columbia Guide to Standard American English. 1993.
point in time
is a cliché, a bit of padded prose. It has been around for a long time, but the Watergate hearings of the 1970s made many people conscious of it and determined to root it out of their language. A single word will usually do nicely: At this point in time is now; at that point in time was then; at some point in time will be sometime.
