The phrase "decade of study" refers to a period of ten years during which someone engages in a focused and extensive pursuit of learning and knowledge in a specific field. Full definition
But even after decades of study there are a surprising number of gaps in our understanding of exactly how mining alters flooding. (skytruth.org)
Despite decades of study, this question has thus far remained unanswered. (sciencedaily.com)
What we've found from decades of studying real - life couples in the lab is that if a person feels insecure or rejected while dating someone — she's not the one. (womenshealthmag.com)