1893 I. iv. 72 In the next age-span of 25 to 29 years, the proportions of the male population..sink.
1968 114 960/2 Especially in the rural areas... the age-span between grandchild and grandmother is so small that the latter can easily serve as a replacement [for a parent].
2008 4 Aug. 19/2 People do change their habits over the age span.