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Make fewer email mistakes during these hours – @Grammarly Insights #amwriting

grammerlyGrammarly Insights

Make fewer email mistakes during these hours


The Internet has made writers of us all. Grammarly analyzed over one billion words proofread by their popular writing app over the course of one month and uncovered some fascinating insights, including the least error-prone time to write.


  • There’s a prime time for drafting emails. Our research shows you’re at your best between the hours of 4 a.m. and 8 a.m.
  • People made an average of 13 mistakes per 100 words when writing email.
    • By comparison, they made 39 mistakes per 100 words when writing social media posts, but only 6.5 when writing blog posts.
  • Watch your spelling! Misspelled words account for more than half of all email mistakes.
  • We write better in the morning. Early birds writing between 4 and 8 a.m. made 18% fewer mistakes than those writing between 10 p.m. and 2 a.m.

Please attribute the research to Grammarly with a link to:


Mistakes by writing type

Writing Type Mistakes per 100 words
Email 13.5
Blogs 7.9
Social Media 39.0

Overall mistakes by time of day *

Time Mistakes per 100 Words
Early Bird (4 – 8 a.m.) 13.8
Night Owl (10 p.m. – 2 a.m.) 17.0

*Average number of mistakes across email, blogs, and social media combined.

Top 5 Confused Words

  • Apostrophe Mistakes (e.g., let’s vs. lets)
  • Too vs. To
  • Everyday vs. Every Day
  • There vs. Their
  • Than vs. Then

The Foreign Language Trend

We’re seeing more foreign language words in English writing. Here are the top five words Grammarly users added to their personal dictionaries.

Word Language Meaning
que Spanish What?
kun Japanese A suffix that can be attached to first names and surnames when addressing male friends or people of junior status.
hyung Korean A word used by a younger male to address an older male or older brother.
au French A contraction of á le, meaning “to the,” “for the,” or “at the.”
bhai Hindi Brother; a friendly way to address a man. Akin to “dude.”


Grammarly did a broad analysis of over one billion words corrected with Grammarly’s extension and Microsoft Office Add-in. We based our findings on the time of day writing mistakes occurred and classified them according to four categories: email, social media, and blogs/Microsoft Word.

About Grammarly

grammerlyGrammarly is a simple and powerful writing app that corrects more types of spelling and grammatical mistakes than any other software on the market. The product suite comprises the Grammarly Editor online editing tool; browser extensions for Chrome, Firefox, and Safari; Grammarly for Microsoft Office; and Grammarly for your desktop, a convenient desktop editor for Mac and PC.

As a company, Grammarly’s mission is to improve communication among the world’s more than 2 billion native and non-native English writers. Millions of registered users worldwide trust Grammarly’s products, which are also licensed by more than 600 leading universities and corporations. Grammarly is an Inc. 500 company with offices in San Francisco and Kyiv.

Please attribute the research to Grammarly with a link to:

Information Submitted by Karen Hertzberg



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