Both normal and average are used as interchangeable terms of convenience rather than terms of art and are usually understood by the reader to refer to an amorphous time period of the recent past. Both terms are very imprecise if the start date is not given. A lot of our discourse shares that imprecision. "Lot" here is also imprecise- see what I mean?
Still using the word normal instead of average
Both normal and average are used as interchangeable terms of convenience rather than terms of art and are usually understood by the reader to refer to an amorphous time period of the recent past. Both terms are very imprecise if the start date is not given. A lot of our discourse shares that imprecision. "Lot" here is also imprecise- see what I mean?