What percentage of Chinese words are 1-character ? ... 2-character? Within an average Chinese person's vocabulary ...

      (which may be ~ 30,000 (?) words,  but this number isn't important) 


could you guess 
 what percentage of the words are 1-character, and
 what percentage of the words are 2-characters? 

My guess would be: 


1-character words ... maybe 45%  (水  石  木  好 我 爱 你 ...) 
2-character words ... maybe 20%  (人民,   君子,   小人,  水滴, ...) 

   ( both numbers may be a bit higher,  like 50% and 25% ) 



(How about for common nouns?)      Thank you.  HH
an unscientific approach: the 國語辭典
, of taiwan, has about 164489 entries, using grep + wildcards, one may find:

12540⋯7.62% are 1 character entry (^.$) e.g. 八, 扒
87516⋯53.20% are 2 characters entry (^..$) e.g. 八伯, 八拜
21836⋯13.28% are 3 characters entry (^...$) e.g. 八拜交, 八敗命
35781⋯21.75% are 4 characters entry (^....$) e.g. 八百羅漢, 八百壯士
2562⋯1.56% are 5 characters entry (^.....$) e.g. 八分休止符, 八風吹不倒


how to define / interpret "word" in the finding, well, it's beyond my knowledge :(