put in

1.  Make a formal offer of, as in a court of law. For example, He put in a plea of not guilty. [Mid-1400s]
2.  Interpose, interject; see put in a good word; put one's oar in.
3.  Spend time at a location or job, as in He put in three years at hard labor, or She put in eight hours a day at her desk. [Mid-1800s]
4.  Plant, as in We put in thirty new trees. [Early 1800s]
5.  Enter a port or harbor, as in The yacht will put in here for the night. [Early 1600s]
6.  put in for. Request or apply for something, as in I put in for a raise, or John put in for department supervisor. [c. 1600]