diff --git a/app/services/diagnose.py b/app/services/diagnose.py
index 4d1c887..2f0c4c7 100644
--- a/app/services/diagnose.py
+++ b/app/services/diagnose.py
@@ -25,16 +25,20 @@ except ImportError:
 
 
 _RELATIVE_RE = re.compile(
-    r"\b(?:last|past)\s+(\d+)?\s*(minute|hour|day|week)s?\b",
+    r"\b(?:last|past)\s+(?:(?P<n>\d+)|(?P<approx>a\s+few|few|couple(?:\s+of)?|several))?\s*(?P<unit>minute|hour|day|week)s?\b",
     re.IGNORECASE,
 )
 _RELATIVE_UNITS = {"minute": 1, "hour": 60, "day": 1440, "week": 10080}
+# Fuzzy quantifiers map to a reasonable span so "last few hours" → 3h window
+_APPROX_N = 3
 
 
 def _relative_window(match: re.Match) -> tuple[str, str]:
     """Convert a relative time match to (since_iso, until_iso)."""
-    n = int(match.group(1) or 1)
-    unit = match.group(2).lower()
+    n_str = match.group("n")
+    approx = match.group("approx")
+    unit = match.group("unit").lower()
+    n = int(n_str) if n_str else (_APPROX_N if approx else 1)
     minutes = n * _RELATIVE_UNITS[unit]
     return _last_n_minutes(minutes), _now_iso()