SEO tracker - use Google Trends to watch keywords
"Code" is a really popular search term, but...it's not relevant to coding or programming. As you can see from the tables below, everyone is looking for postal codes and mobile phone codes
As we're trying to describe a service, we would get better search visibility by calling ourselves a 'school' than a 'tutor'. But, you must be honest with what you're offering. If you think people searching for a school might be interested in a tutor, then go ahead. Otherwise, think of another, better search term.