Longman Dictionary of Contemporary English
time span
noun
EXAMPLES FROM CORPUS
▪ Development of all major new weapons programmes would nevertheless continue but over a longer time span.
▪ I call this measure the responsibility time span of the role.
▪ Statistically this loss rate is low seen in the perspective of the number of flying Spitfires over this time span.
▪ The time span of observation in these studies varies from a few minutes to several hours.
▪ The time span which is likely to be required for a generation of more effective large-scale entrepreneurs to evolve is considerable.
▪ This survey provides a particularly rich source of data because of the long time span covered.
▪ We shall not make any comments about this until we have had a chance to inspect a longer time span.