understanding, comprehension / appreciation

contents (something inside a container) / content (the information conveyed in document, conversation, lecture, etc.), details, substance

time / hour / the hours or time when something happens

the main text (as opposed to appendices etc.) / an official document (as opposed to a draft) / an original document (as opposed to a copy)

detailed

details

understand, comprehend / appreciate

extraordinary, unusual

emergency

very; extremely / exceedingly; tremendously