Calculated column to show number of items selected in a multichoice field

Question

In SharePoint I have a table with a lookup column that takes in multiple values. I am having a problem finding a code for a calculated column that counts how many values the user chose. For example,

    Favorite Ice Cream
1   Vanilla; Chocolate; Strawberry

2  Cookies and Cream; Mint

3   Coconut; Chocolate; Butter Pecan; Strawberry

And an adjacent column will be...

    Number of total Ice Cream
1    3

2    2

3    4

Thank you in advance!