If you put in an amount of time or effort doing something, you spend that time or effort doing it. They've put in time and effort to keep the strike going If we don't put money in we will lose our investment
If you put in a request or put in for something, you formally request or apply for that thing. The ministry ordered 113 of these and later put in a request for 21 more I decided to put in for a job as deputy secretary
make an application as for a job or funding; "We put in a grant to the NSF" devote time, effort, etc
When a ship puts in or puts into a port, it goes into the port for a short stop. It's due to put in at Aden and some other ports before arriving in Basra