There are total 2 rakes shared between 12975/76-19713/14 and its rake sharing works in the below ways;
Rake 1: 12976 - Departs Jaipur on a Monday, returns to Jaipur as 12975 on a Saturday. The same rake leaves Jaipur as 19713 the same day (Saturday) and returns at Jaipur as 19714 on Wednesday.
Rake 2: 12976 - Departs Jaipur on a Wednesday, returns to Jaipur as 12975 on a Monday. The same rake leaves Jaipur as 12976 the same day (Monday) and again the Rake 1 pattern continues....