You wanna look for
"Real world examples of the linguistic concepts you learn in unit 3/4"
So for example, if you see real world examples of how language can be used to obfuscate Eg the 2016 budget

really confusing to read
Then break that example up linguistically and then record them so you can chuck em out in an essay!
Essentially you are trying to decode the world linguistically so that you have a wealth of knowledge to throw out in essays ! They make your arguments stronger!
So yeah I would recommend coming up with someone linguistic topics and then see if you can find articles about them
For me I have got
- Language being used to obfuscate
- language as a marker of group identity or national identity
- politically correct language
- Language reflecting changing and shifting values
....... I have a few others but that is off the top of my head