Have fun while learning and getting to know more about your language skills.
An app that gives you a sentence to rewrite. It then analyzes your sentence and gives you a score based on how developed your vocabulary is. It will also show you other possibilities for rewriting the sentence.
To find out when and how it was created and gained momentum, and see from multiple points of view its speed (chronological, geographical, generational, etc.)
Analyze online sources of data to find the first occurrence of a word or phrase and plot the spread and usage.