diff --git a/packages/core/pattern.mjs b/packages/core/pattern.mjs
index f3f19f874..db1d9d0b7 100644
--- a/packages/core/pattern.mjs
+++ b/packages/core/pattern.mjs
@@ -3100,3 +3100,23 @@ export let xfade = (a, pos, b) => {
 Pattern.prototype.xfade = function (pos, b) {
   return xfade(this, pos, b);
 };
+
+
+/**
+ * creates a structure pattern from divisions of a cycle
+ * especially useful for creating rhythms
+ * @name onSubCycle
+ * @synonyms onSub, os
+ * @example
+ * s("bd").os("0:7:10", 16)
+ * @example
+ * s("sd").os("4:12", 16)
+ */
+export const {onSubCycle, onSub,  os} = register(['onSubCycle', 'onSub', 'os'], (times, div, pat) => {
+  if (typeof times === 'number') {
+    times = [times]
+  }
+  return stack(
+  ...times.map(t => pat.pressBy(_mod(t, div)/div).duration(1/div))
+ )}
+)