"lots of times" is correct and usable in written English. You can use it to refer to multiple occurrences of an event or situation. For example: "I've been to London lots of times over the years."
Lots of times.
"Lots of times," he said.
"Lots of times I go empty.
I'm unhappy lots of times.
everybody's unhappy lots of times.
Freeman: Lots of times, yes.
They require lots of time and resources.
They've certainly had lots of time.
"We've got lots of time.
"But it will take lots of time".
He has lots of time.
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Claudia Letizia
Head Translator and Proofreader @ organictranslations.eu