1. "God's curse" (used frequently) - This phrase, while still common today, was a more casual way of expressing profound despair or divine punishment in Shelley's time.
2. "A pretty piece of business" (Chapter 10) - This phrase signifies a situation that's difficult or unfortunate, and is a lighthearted way to express something negative.
3. "Go to the devil" (Chapter 16) - This expression is a forceful way to tell someone to go away, and it was used more freely in Shelley's era.
4. "You are a lucky dog" (Chapter 18) - This phrase is a playful way of saying someone is fortunate or lucky.
5. "I am not so green as to be caught" (Chapter 19) - This phrase indicates someone is not naive and can avoid being tricked.
6. "I shall make you laugh" (Chapter 21) - This phrase is a humorous and somewhat lighthearted way of saying someone will be entertained.
These examples, while not extensive, show how Shelley incorporated some colloquialisms into her writing, which adds a touch of realism and everyday language to the novel. It's important to remember that "Frankenstein" is a period piece, so its use of colloquialisms reflects the language of the early 19th century.