Choose the data source: your own users, a survey of 200, or public records
Your own anonymised usage is free and nobody else has it. A survey needs a sample you can state: print the number of answers beside every percentage.
Step 6.6.3.2
Time: 2h
Keep reading
The whole library, sourced.
Topics, plays, terms and the evidence behind each launch-plan step, every claim linked to the page it came from.