Pre-teen to young adult yearly language input estimate:
TV 4.5 HRS 27,000 words per day, 9,828,000 words per year
The equivalent of 98 books.
Other screen time: 4 hours
2 hrs reading, movies, surfing, working etc. Counted as reading @ 150 wpm 18,000 words per day, 6,552,000 words in a year.
Two hours subtracted for video games and other non-productive screen time and accounting for the fact that some videogames do contain spoken language etc. This is fair especially since the remaining two hours are counted as reading. Pre-Teens play computer and video games 3 hours per day, more than teens (2 hours per day) or young adults (1 hour per day). Screens are also used for viewing pictures etc.
Studying 2 hours @ 150 wpm 18,000 WORDS 6,552,000 words in a year
VERBAL COMMUNICATION 30,000 words per day 11,000,000 words per year (your daily life is 5 hours of sitcom)
Total: Approximately 90,000 - 100,000 words per day or 34-36 million words of input per year
Approximate native learning path through input
YRS 1-3 10,000,000 words (max. 30,000,000)
TV 35,000,000 words
verbal communication 15,000,000 words
Total: 50,000,000 words
TV 26,208,000 words
reading 5,000,000 words (assuming that 5th-grade children actually do read about 5,300 words per day)
verbal communication 10,000,000
Total: 41,000,000 words
Yrs 1-10 easily over 100,000,000 words (1,000 books)
YRS 11-17 250,000,000 words
Total 350,000,000 words (the running text of 3,500 average books)