Lifetime-Life-Time | Commonly Confused Words

Lifetime

/ˈlaɪftaɪm/

The period during which someone lives or something lasts

'For a lifetime, then.It was the chance of a lifetime for Lenina."I did a lifetime is talking when I was a preacher."

This word has no antonyms

/ˈlaɪfˌtaɪm/

The total duration of an individual's life or the existence period of something

Lifetime is a single word, and it usually refers to the span of time from birth to death.
You will use lifetime when talking about someone's whole life as an abstract concept or measurement.
Use life time as two separate words when specifying or describing the amount of time in life for a specific context or scientific measurement.
Remember lifetime as one word is like thinking of it as a unit of life.
Life time as two words might be useful when detailing or exploring aspects of biology or lifespan data.