I've lived here five years VS I've lived here for five years

[Rachel Chelt]

"I've lived here five years" VS "I've lived here for five years"

Hi all. I hope you're well.

I'm struggling to find a decent explanation of why it's okay to use or omit 'for' in the above two clauses. Can anyone point me in the right direction, please? I'm a newish TEFL tutor and am still getting to grips with some of the finer details in the grammar world.

Speaking English as a native is one thing, explaining it all is a completely different ballgame!

Big thanks.

[Chrome]

I don’t think it IS okay to omit “for”. It sounds slangy to me or at least very informal, almost lazy. But I probably do it myself in informal cases:
No worries. I’ve only been here five minutes.

[Firefoxjo]

I don’t think it IS okay to omit “for”. It sounds slangy to me or at least very informal, almost lazy. But I probably do it myself in informal cases:
No worries. I’ve only been here five minutes.

I agree