Actually I doubt that this is a true statement and not something to discourage others. Check out these queries:
https://www.google.com/search?q=1 12B results
https://www.google.com/search?q=an 9B results
https://www.google.com/search?q=the 6B results
If we estimate that about half of all English pages contain 'the' or 'an' article we'll have about 15B English pages. If half of all pages contain the '1' then the total number of pages is about 24B. If half of all the pages are in English then the total number of all the pages is 30B. So even the maximum is less than the "hundreds". Similar numbers are at https://www.worldwidewebsize.com/