I have been sleeping for 1 hour vs i had been sleeping for 1 hour

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Looking on the internet deeply has found these results:

i have been sleeping for 1 hour is the most popular phrase on the web. 

i had been sleeping for 1 hour

13,470,000 results on the web

i have been sleeping for 1 hour

128,100,000 results on the web

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Some examples and use cases from the internet:

Some examples and use cases from the internet:

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