diff --git a/.github/workflows/check-spelling.yaml b/.github/workflows/check-spelling.yaml
index df356cf0f..9def1c659 100644
--- a/.github/workflows/check-spelling.yaml
+++ b/.github/workflows/check-spelling.yaml
@@ -1,8 +1,10 @@
 on:
   push:
     branches: [main]
-  pull_request:
-    branches: [main]
+  schedule:
+    # * is a special character in YAML so you have to quote this string
+    # Trigger once a week at 00:00 on Sunday
+    - cron: "0 0 * * SUN"
 
 name: check-spelling
 
diff --git a/.github/workflows/check-styling.yaml b/.github/workflows/check-styling.yaml
index ca0027b04..cfa17ff44 100644
--- a/.github/workflows/check-styling.yaml
+++ b/.github/workflows/check-styling.yaml
@@ -1,8 +1,10 @@
 on:
   push:
     branches: [main]
-  pull_request:
-    branches: [main]
+  schedule:
+    # * is a special character in YAML so you have to quote this string
+    # Trigger once a week at 00:00 on Sunday
+    - cron: "0 0 * * SUN"
 
 name: check-styling