An apprentice priest is commonly referred to as a "seminarian." This term describes a student in a seminary, where they receive theological education and training in preparation for ordination as a priest. Depending on the specific religious tradition, they may also be called "deacon" if they have been ordained to the transitional diaconate as part of their formation.
Although I have never heard the term "parish apprentice", I would assume that it would refer to a curate: a just ordained priest who is assigned under a pastor to "apprentice".
The apprentice is called Dave Stutler, the sorcerer is called Balthazar Blake, the villain is called Maxim Horvath, and the villain's apprentice is called Drake Stone.
The 7th Last Apprentice book is called Rise of the Huntress.
The book is called the fourth apprentice, the series is called omen of the stars
A butcher's apprentice is typically called a "butcher's assistant" or simply an "apprentice butcher." They work alongside experienced butchers to learn the skills and techniques of the trade.
He is called a carpenters apprentice.
A Jedi apprentice is called a padawan.
apprentice
Quite simply, he is called a priest.
That would be an apprentice.
The Parish Priest
I believe the reason Peg is an apprentice is because she is new at being responsible. She learns this by teaching her dog Rollie responsibility