The long period of stagnation in graduation rates between 1970 and 2000 is especially puzzling given that the financial rewards for completing high school rose sharply during these years. (educationnext.org)
«The next three to five years will be a long period of stagnation for San Francisco. (nreionline.com)
AI has been around for decades, since at least 1956, and there have been periods of productivity in AI which have been followed by periods of stagnation. (slaw.ca)