I run a blog on some kind of tutorial. Every page literally has 20 occurrences of a keyword that I try to explain. I need to "highlight" the keyword that is being used on every page.

Currently, I write down the whole post. Then save. Switch to Code Editor and then find each occurrence of the keyword. I wrap it around as follows:

Original:

keyword

After modifying:

<span style="background-color:#f7f9de;">keyword</span>

How can I make this kind of highlighting easier? Perhaps a way to quickly highlight this way by selecting the text and choosing a hotkey? I don't want to go into code editor and search/replace every occurrence because it quickly gets tedious.