This is where so many people without a desire to study the Bible fall into the trap of, "The Bible is obscure so it can't have any meaning for me personally".
I am glad that you are one of the people that has an interest to pursue the matter beyond merely passing it by without any further thought. As I stated in the beginning of the post, "God is a rewarder of the diligent student". He created us with the amazing capacity for understanding subtleties (eg. body language, reading between the lines, double intentions...). However, in this case, buried within the context, we have a straightforward usage of the Hebrew meaning "weeks" as in the following passage which I indicated in Link #2.
In the second link was posted:
Here is a perfect passage that illustrates how the word week is used to mean seven years.
Gen 29:26-28
26 And Laban said, It must not be so done in our country, to give the younger before the firstborn.
27 Fulfil her week, and we will give thee this also for the service which thou shalt serve with me yet seven other years.
28 And Jacob did so, and fulfilled her week: and he gave him Rachel his daughter to wife also.
Thank you for your interest, and I pray that this fulfilled prophecy produces a desire in you to seek God via His readily available message to you. The Holy Bible.