Related Clues:

• Abbr. for seasons played
• Time line markings: Abbr.
• Mos. add up to them
• Brief letter sign-off
• Cent. parts
• Century divs.
• Decade divs.
• Dozens of mos.
• Univ. divisions
• Many, many mos.
• They go by fast (Abbr.)
• Lots of mos.
• Cal. stretches
• Signoff like "Truly," but shorter
• Abbr. that comes with age