IPA: /prəˈlɪfɪsɪti/
KK: /prəˈlɪfɪsɪti/
The quality of being highly productive or fruitful, especially in creating works of art, literature, or other forms of expression.
The prolificity of the author is evident in the numerous books she has published over the years.
Prolificity → It is formed from "prolific" (from Latin "prolificus", meaning fruitful or productive) and the suffix "-ity" (meaning the state or quality of). The word "prolificity" refers to the state of being prolific or highly productive.
Think of being 'fruitful' ('prolific') and the '-ity' indicating a state or quality — that's why prolificity means the quality of being highly productive.
No commonly confused words.