KAJERO

[ROOT]
└─ 1 study  main finite verb
   ├─ 2 of  adverbial
   ├─ 3 the  adverbial
   ├─ 4 statistical  adverbial
   ├─ 5 usage  adverbial
   ├─ 6 of  adverbial
   └─ 7 words  adverbial

[ROOT]
└─ 1 study  fragment
   ├─ 2 of  adverbial
   ├─ 3 the  adverbial
   ├─ 4 statistical  adverbial
   ├─ 5 usage  adverbial
   ├─ 6 of  adverbial
   └─ 7 words  adverbial