Hythlodaeus

Ilm = Inch
Fulm = Foot (12 Ilms)
Yalm = Yard/Meter (3 Fulms)
Malm = Mile (1760 Yalms)

Onze = Ounce
Ponze = Pound (16 Onzes)
Tonze = Ton (2,000 Ponze)

Bell = Hour (1 Hour)
Sun = Day (24 Bells)
Sennight = Week (8 Suns)
Fortnight = 2 Weeks (16 Suns)
Moon = Month (32 Suns)
Year = Year (12 Moons)
Epoch = 12 Years or one full Zodiac.

Astral Era = Time when mankind builds up his civilizations. (Seem to average 1000-1500 years.)
Umbral Era = Time when mankind tears down his civilizations. (Length of time varies greatly.)