The phrase "phenomenal amount" means a very large or extraordinary quantity or number of something.
Sentences with «phenomenal amount»
WHY do you need to hold on to the author's rights for lifetime + 70 years if it is selling phenomenal amounts of copies? (jakonrath.blogspot.ru)
While it's widely acknowledged that forests can be useful for holding carbon, they release phenomenal amounts of greenhouse gases when they burn. (psmag.com)
But we don't hold onto them for 70 years unless the book is selling phenomenal amounts of copies. (jakonrath.blogspot.ru)