That's a good question, Tony. Let's see ... in Late Imperial Atreidean
Galach, we have (in order of frequency of use)...
1. plansh
2. balai
3. fladein
4. sapak
5. qiiff
6. keruk
7. talasha
8. frust
9. dandand
10. presas
11. liss
12. marsat
13. bofor
14. irtang
15. fesh-rahat
16. tablatawbli
17. rabafufu
18. mur
19. rephas
20. auchar
21. phree
22. sazarabalakar
23. tshremk
24. kurth
25. pu
26. yinyan
27. bop
28. git
Twenty-eight. :)