diff --git a/output/schema/schema.json b/output/schema/schema.json
index 5caaca6284..94817eec02 100644
--- a/output/schema/schema.json
+++ b/output/schema/schema.json
@@ -50806,52 +50806,22 @@
           "name": "exclude",
           "required": false,
           "type": {
-            "items": [
-              {
-                "kind": "instance_of",
-                "type": {
-                  "name": "string",
-                  "namespace": "_builtins"
-                }
-              },
-              {
-                "kind": "array_of",
-                "value": {
-                  "kind": "instance_of",
-                  "type": {
-                    "name": "string",
-                    "namespace": "_builtins"
-                  }
-                }
-              }
-            ],
-            "kind": "union_of"
+            "kind": "instance_of",
+            "type": {
+              "name": "TermsExclude",
+              "namespace": "_types.aggregations"
+            }
           }
         },
         {
           "name": "include",
           "required": false,
           "type": {
-            "items": [
-              {
-                "kind": "instance_of",
-                "type": {
-                  "name": "string",
-                  "namespace": "_builtins"
-                }
-              },
-              {
-                "kind": "array_of",
-                "value": {
-                  "kind": "instance_of",
-                  "type": {
-                    "name": "string",
-                    "namespace": "_builtins"
-                  }
-                }
-              }
-            ],
-            "kind": "union_of"
+            "kind": "instance_of",
+            "type": {
+              "name": "TermsInclude",
+              "namespace": "_types.aggregations"
+            }
           }
         }
       ],
diff --git a/output/typescript/types.ts b/output/typescript/types.ts
index 9b43ef5dd9..ead13caac7 100644
--- a/output/typescript/types.ts
+++ b/output/typescript/types.ts
@@ -3248,8 +3248,8 @@ export type AggregationsFrequentItemSetsBucket = AggregationsFrequentItemSetsBuc
 
 export interface AggregationsFrequentItemSetsField {
   field: Field
-  exclude?: string | string[]
-  include?: string | string[]
+  exclude?: AggregationsTermsExclude
+  include?: AggregationsTermsInclude
 }
 
 export type AggregationsGapPolicy = 'skip' | 'insert_zeros' | 'keep_values'
diff --git a/specification/_types/aggregations/bucket.ts b/specification/_types/aggregations/bucket.ts
index 88dbb1d2b0..2b7c4f53c2 100644
--- a/specification/_types/aggregations/bucket.ts
+++ b/specification/_types/aggregations/bucket.ts
@@ -544,8 +544,8 @@ export class IpPrefixAggregation extends BucketAggregationBase {
 
 export class FrequentItemSetsField {
   field: Field
-  exclude?: string | string[]
-  include?: string | string[]
+  exclude?: TermsExclude
+  include?: TermsInclude
 }
 
 export class FrequentItemSetsAggregation {