I saw this in a Web article about English.

Problem:
“Everyday” is an adjective, but an adverb is required here.

Explanation:
I was searching the Web for the negative effect of spelling errors when I found this sentence.

The sentence appeared in an article titled “COMMONLY MISSPELLED WORDS“, which gave parents the recommended frequency and duration of helping their children to learn the correct spellings of words.

Unfortunately, one can spell words correctly but still make mistakes with grammar.

“Everyday” — spelled E-V-E-R-Y-D-A-Y — tells you what. For example, an “everyday event” is something that occurs daily. In other words, “everyday” is an adjective; it modifies a noun (such as “event”).

In contrast, “every day” — spelled E-V-E-R-Y-SPACE-D-A-Y — tells you when. “It happens every day.” is an example of the correct use of “every day” (with the space in the middle).

The goal of the article writer was to tell the reader when to spend fifteen minutes with words.

Solution:
“Spend 15 minutes every day with the words.”