When manually doing expenses, do you put the description and amount for the year or do I do it individually by month/week/day?

For example, internet is something required to do my job, would I put Description: Internet Service Amount: $140 (monthly cost) and insert that 12 times or Amount: $1,680 (yearly cost) and insert once (I'm very new to this, I apologise if it's a silly question, I just want to make sure I do it right)