Final answer:
There are no occurrences of contested usage in the given sentences.
Step-by-step explanation:
In the given sentences, there are no occurrences of contested usage. Both sentences are grammatically correct, and there are no disputed words or phrases.
The question asks to identify contested usages in the provided sentences. Contested usage usually refers to aspects of language that may be disputed or considered incorrect in certain contexts, such as grammar, punctuation, word choice, etc. Upon reviewing the given sentences, there doesn't appear to be any contested usage present as both sentences appear to be grammatically correct with the context provided.