The term YR. DIVISIONS can be broken down into two parts: YR and DIVISIONS. YR stands for 'year', and DIVISIONS is a plural noun meaning 'a part or section of something larger'. The two crossword solutions for this term are MOS (3 letters) and WKS (3 letters). MOS stands for 'months of service', which is a military term referring to the length of time a person has served in the armed forces. WKS stands for 'weeks', which is a unit of time equal to seven days. Together, these two solutions refer to the divisions of time that make up a year.