Manually updated with data taken from the activity timeline whenever I have the time and the desire.
You can see the daily average at the bottom of the page.

green >= 4,000    bright yellow = 3,000 to 3,999    light yellow = 2,000 to 2,999    gray < 2,000
Days with over 5,000 are likely days when many sentences were imported.

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Days start at 00:00 GMT.