Hey again 
The interp nodes are intended to be a constant interpolation on Tick, not having a start and end really. That’s why there’s no specified timing.
Timelines with a specified curve or iTween Float From/To is the way to go for this use case:
iTween : Free, smooth, procedural object animation
easyCSV : Read data from any CSV and put them in an easy-to-access string map!
Runtime DataTable : Import and export game data to and from CSV or Google Sheets while your game is running!