The ditloid "17 C S" stands for "17 syllables" in a haiku. A haiku is a traditional form of Japanese poetry that consists of three lines with a syllable pattern of 5-7-5. Thus, the total adds up to 17 syllables.
The ditloid "90 S in C A" stands for "90 Seconds in a Countdown." This phrase refers to the time duration used in various countdown scenarios, such as in games or competitions.
10 Christmas cards in a set of cards
33 vertebrae in the spinal column
This is a Ditloid. The answer is 0 (zero) Sides on a Circle.
122 spaces in a Chinese checker board
54 Squares on a Rubik's Cube
seven spikes on the statue of liberties head
17 yak liquorish
"Twelve Ounces in a Can of Soda", the most common size for soft drinks in the U.S.
7 Digits in a Zip Code
32 Counties in Ireland
ten commandments