How long did you know? vs how long do you know about it?

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Looking on the internet deeply has found these results:

how long did you know? is the most popular phrase on the web. 

how long do you know about it?

12 results on the web

how long did you know?

1366,000 results on the web

More popular!

Some examples and use cases from the internet:

Some examples and use cases from the internet:
  • What do you know about it?
  • What do you know about long term relationships?
  • Well, I sing there for open
  • mike night.
  • How do you know about it?
  • What do you know about it?
  • How long you know about this?
  • It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

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