I think it's along the lines of "going steady" it means that you've found the right person and you want to stick with them and possibly start a life with him/her. There isn't really an age period I guess, most likely whenever you find the right person. When you settle down with someone, you are comfortable with the idea of being with that person and committing yourself to the person indefinitely and perhaps forever. It can happen at any age (usually over 18).
No normally your period should only come once a month but if your period has just started then they usually take a while to settle into a pattern. If it continues you should visit a doctor.
1800s
No one should settle for a part time relationship!
The War to Settle the Score happened on 1985-02-18.
To settle down, to be in a committed relationship.
No, not really as cheap amounts can be handled away with cash. Checks usually settle out over a longer period of time whereas, cash can easily be settled out.
The gas inside of a tennis ball will usually settle when frozen. In most cases this means that it will either freeze or cause the ball to shrink.
Usually to settle disputes.
these things do not happen all the time, however, if you look too hard it will never happen and then when you least expect it , it could be around the corner, too many people will get into a relationship that will last a long time and they are extremely unhappy. that means they just "settle" for what they can get. If you have great friends that you have fun with and have great conversations you are probably more happy and content than people who are in a marriage or a dull relationship.
If they are nomads, they usually arent going to settle down. Or they wouldnt be called Nomads! :)
This happened roughly around 1214
More or less. Usually within 4-5 days from the last one. If you are just starting your period it takes about a year before it will settle down to a regular cycle. The same thing happens at menopause. It all has to do with hormones.