Finding probability

Hi everyone, I’m new to KNIME and as a part of my uni project i would like to find how likely a person is to click a link based on their job title with help of historical data.

My data set looks something like that:

Job title Historical clicks

Professor 5

Director 30

Janitor 2

and so on.

My data set have around 40000 different job titles and i was trying to utilize Linear regression learner, but if i want to process everything at once it says that there are too many unique job titles. As far as I understand one column is a string and other is an intiger, and they don’t want to work in learner node and in linear correlation node. Could you please give me a hint in right direction?