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Discover LudwigThe phrase "life span of" is correct and usable in written English.
You can use it to refer to the length of time something lives or is active for. For example, "The life span of a butterfly is only a few weeks."
Exact(54)
What's the life span of these crickets?
Do we know the life span of the giant squid?
What is the average life span of an Afghani citizen?
The life span of a tube varies substantially.
The tapes have a normal life span of 10 years.
Instead it prolonged the life span of cells.
Red cells have an average life span of 120 days.
Little is known about the life span of cephalopods.
Similar(3)
Little is known about the life-span of leeches.
This will also increase the life-span of electrodes.
These patterns gradually changed over the life-span of mice.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com