The expression "z times" can be synonymous with several other phrases. For example, it can mean "z-fold," as in folding a piece of paper multiple times to create divisions. "Multiplying by z" also conveys the same idea, suggesting that a quantity is being increased by a factor of z. Similarly, "repeating z times" implies that an action is occurring a specific number of occasions. In programming, "iterating z times" refers to a loop running a set number of times. Regardless of the specific context, each of these phrases encapsulates the idea of performing an operation multiple times. Choosing the most appropriate synonym can depend on the context and the desired emphasis of the statement.