orcl> select count(*) from all_objects where object_type='VIEW' and object_name like 'ALL%';

  COUNT(*)
----------
       587

orcl>

SQL> select table_name, comments
  2  from dictionary
  3  where table_name like 'ALL%'
  4    and lower(comments) like '%role%'
  5  order by 1
  6  /
TABLE_NAME                     COMMENTS
------------------------------ ---------------------------------------------------------------------------
ALL_COL_PRIVS                  Grants on columns for which the user is the grantor, grantee, owner,
                                or an enabled role or PUBLIC is the grantee
ALL_COL_PRIVS_RECD             Grants on columns for which the user, PUBLIC or enabled role is the grantee
ALL_TAB_PRIVS                  Grants on objects for which the user is the grantor, grantee, owner,
                                or an enabled role or PUBLIC is the grantee
ALL_TAB_PRIVS_RECD             Grants on objects for which the user, PUBLIC or enabled role is the grantee