How do I calculate the high time and low time of a 555 timer circuit? R1= 1K Ohms R2= 68k Ohms C= 2.2 pF?

R1= 1K Ohms
R2= 68k Ohms
C= 2.2 pF
Update: Right, I know the equations but I cant figure out how to calculate Ohms vs Pico Farads... Forgot to add that in.
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