diff --git a/lib/instrument/dummy.go b/lib/instrument/dummy.go
index fd71c47..a685bbe 100644
--- a/lib/instrument/dummy.go
+++ b/lib/instrument/dummy.go
@@ -10,5 +10,5 @@ func Init() Instrument {
 	return &dummyInst{}
 }
 
-func (i dummyInst) Visit(section string, id string, search string, fmt string) {}
-func (i dummyInst) Duration(section string, duration time.Duration)            {}
+func (i dummyInst) Visit(section string, id string, search string, fmt string)     {}
+func (i dummyInst) Duration(section string, search string, duration time.Duration) {}
diff --git a/lib/instrument/instrument.go b/lib/instrument/instrument.go
index a1f5e38..c7b9181 100644
--- a/lib/instrument/instrument.go
+++ b/lib/instrument/instrument.go
@@ -4,5 +4,5 @@ import "time"
 
 type Instrument interface {
 	Visit(section string, id string, search string, fmt string)
-	Duration(section string, duration time.Duration)
+	Duration(section string, search string, duration time.Duration)
 }
diff --git a/lib/instrument/prometheus.go b/lib/instrument/prometheus.go
index bc00fae..aafa7d2 100644
--- a/lib/instrument/prometheus.go
+++ b/lib/instrument/prometheus.go
@@ -37,7 +37,7 @@ func Init() Instrument {
 			Name: "trantor_request_duration_seconds",
 			Help: "Duration of the request in seconds.",
 		},
-		[]string{"section"},
+		[]string{"section", "search"},
 	)
 
 	prometheus.MustRegister(visits)
@@ -61,6 +61,6 @@ func (in promInst) Visit(section string, id string, search string, fmt string) {
 	in.visits.WithLabelValues(section, id, search, fmt).Inc()
 }
 
-func (in promInst) Duration(section string, duration time.Duration) {
-	in.reqDur.WithLabelValues(section).Observe(duration.Seconds())
+func (in promInst) Duration(section string, search string, duration time.Duration) {
+	in.reqDur.WithLabelValues(section, search).Observe(duration.Seconds())
 }
diff --git a/lib/stats.go b/lib/stats.go
index f4ccd96..4efe4c3 100644
--- a/lib/stats.go
+++ b/lib/stats.go
@@ -120,7 +120,7 @@ func (sg StatsGatherer) worker() {
 		}
 
 		sg.instrument.Visit(section, id, search, fmt)
-		sg.instrument.Duration(section, req.duration*time.Microsecond)
+		sg.instrument.Duration(section, search, req.duration)
 		switch section {
 		case "download":
 			err = sg.db.IncDownloads(id)