Final answer:
To check for writing errors and make the requested changes, use a single command to replace a word, fix the grammar error, and accept a writing suggestion.
Step-by-step explanation:
In order to check for writing errors and make the specified changes, you can use a single command to replace all instances of the word 'treatmants' with 'treatments'. To fix the grammar error, you need to identify the specific error and make the necessary correction. Finally, you should accept the writing suggestion to change 'A lot of times' to 'often'.