Reemplace la última aparición de palabra entre 2 palabras con RegEx

I'm working with RegEx on Java and here is where I stuck.

I have a simple string like

String sample1 = "word 231 sadas aslkjasf anything ORDER what whut ASC hello ORDER whatever."

I have to find every substring until the last occurrence of ASC entre dos ORDERs and replace them with word QQQ.

He aquí algunos ejemplos:

String sample1 = "word 231 sadas aslkjasf anything ORDER what whut ASC hello ORDER whatever.";
String result1 = "word 231 sadas aslkjasf anything QQQ hello ORDER whatever.";
// replaced "ORDER what whut ASC"

String sample2 = "word 111 sadas anything ORDER what whut yeap ASC nope ASC maybe ORDER yeah.";
String result2 = "word 111 sadas anything QQQ maybe ORDER yeah.";
// replaced "ORDER what whut yeap ASC nope ASC"