Update website/pages/api-v16/language.mdx

Co-authored-by: Yaacov Rydzinski  <yaacovCR@gmail.com>

Author: janmeier

website/pages/api-v16/language.mdx

@@ -219,7 +219,7 @@ const editedAST = visit(ast, {
 
 Alternatively to providing enter() and leave() functions, a visitor can
 instead provide functions named the same as the kinds of AST nodes, or
-enter/leave visitors at a named key, leading to tree permutations of
+enter/leave visitors at a named key, leading to three permutations of
 visitor API:
 
 1. Named visitors triggered when entering a node a specific kind.