The 'decade' of the 1920s runs from January 1, 1920 to December 31, 1929.
There have been a lot of changes during/in/over the past two 'decades'.
a 'decade' of drought [=a drought that lasted 10 years]
(..) This damage was not caused by a discrete event. The remodeling of the ischia and both clavicles indicate it was incurred over the course of the last decade. SAROYAN: You're right-- the acromioclavicular ligament shows signs of repeated dislocation. I'm also seeing signs (..)2015 TvShow: Bones Title: The Promise in the Palace Season: 11 Episode 7