The phrase "age spans" is correct and usable in written English.
It can be used to refer to the range of ages that a particular group or category encompasses.
Example: "The study focused on the developmental milestones across different age spans, from infancy to adolescence."
Alternatives: "age ranges" or "age groups".
With the wide age spans in kindergarten classrooms, each new generation of preschool parents must grapple with where exactly to slot their children.
Coincidentally, "The Golden Age" spans the same time period (1939-54) that is captured far more zestily by another current cameo-filled novel, Michael Chabon's "Amazing Adventures of Kavalier & Clay".
The peak incidence is in the 3rd decade of life, but age spans from late childhood to the 5th decade have been reported [19].
The last ∼500 to 300 years in the 14C calibration curve is problematic with wide fluctuations often rendering large age spans that do not precisely date single events, especially troubling with a culture-historical record of ∼1000 years duration.
The plot progression of The Lost Age spans many continents, islands, and oceans around the two main continents where the previous game takes place.
There is no consensus on which age spans to study, due to differences in local regulations.
As the age span has increased, osteoporosis has become the fourth most common disease in aged adults.
Though Arabic science was productive for more than 500 years, its golden age spanned the 9th and 11th centuries.
Its golden age spanned the end of the 19th century and the beginning of the 20th, when the country began to open up to the west.
The public hunts tend to draw people in their 20's and 30's, though the age span was wide on the hunt I attended.
Over seven days, people responded from 46 countries, with a 70-year age span from those born in 1925, to those born in 1995.
