Google returns: "About 782,000,000 results (0.45 seconds) "
But yeah, estimated result count is still a big lie either way
[0] https://www.google.com/search?q=apple&start=440&sa=N&filter=...
The 447 results you paged through are just the most relevant docs for your particular query ("apple" + country) and Google doesn't bother retrieving any further. Your use case of finding all the pages with the term "apple" is simply too rare and too expensive to support and they don't optimize for it.
If you try different query variants apple + something with different locales (&hl=) you'd get very different top NNN results.
100*10 results per page= 1000
Google only shows 1000 results for each query. Even if it says 100 million found