different between shittiness vs shiftiness

English

shitty +? -ness

shittiness (uncountable)

From shifty +? -ness

shiftiness (countable and uncountable, plural shiftinesses)

(uncountable) The property of being shifty.
- 1973, Socialist Review (volume 8, page 331)
  Mr. Henderson's chief trouble seems to be that he cannot forget his old shiftiness of views and his pendulum-like swingings between Liberalism and Independent Labourism […]
(countable, rare) The result or product of being shifty.

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