Took 22883.20790910721 seconds(~6 hours)
Method =
- Use num ID to filter similar sounding words, add to anomaly if exists only once
- Use similar to filter similar sounding words, add to anomaly if it is unique
- Date time of the columns to calculate the time since last purchase for each item
- Run Isolation Forest clustering on each group, and add it to anomaly if it is an outlier