diff --git a/ubb-la/gui.c b/ubb-la/gui.c
index c448471..b17c3d8 100644
--- a/ubb-la/gui.c
+++ b/ubb-la/gui.c
@@ -65,6 +65,10 @@
 #define	FREQ_Y		220
 #define	INTERVAL_X	0
 #define	INTERVAL_Y	230
+#define	DIV_SAMP_X	(80-8)
+#define	DIV_SAMP_Y	FREQ_Y
+#define	DIV_INT_X	80
+#define	DIV_INT_Y	INTERVAL_Y
 
 #define	REPEAT_DELAY_MS		300
 #define	REPEAT_INTERVAL_MS	30
@@ -340,10 +344,15 @@ static void si_text(int x, int y, double v, const char *unit)
 }
 
 
-static void show_freq(double freq)
+static void show_freq(double freq, int zoom)
 {
+	int div;
+
 	si_text(FREQ_X, FREQ_Y, freq, "Sa/s");
 	si_text(INTERVAL_X, INTERVAL_Y, 1/freq, "s/Sa");
+	div = (DIV_X >> MAX_ZOOM) << (MAX_ZOOM-zoom);
+	textf(DIV_SAMP_X, DIV_SAMP_Y, TEXT_RGBA, "%4dSa/div", div);
+	si_text(DIV_INT_X, DIV_INT_Y, div/freq, "s/div");
 }
 
 
@@ -387,7 +396,7 @@ void gui(const uint8_t *buf, int skip, int nibbles, double freq)
 			textf(0, ch_y(i, 1), LABEL_RGBA, "CH%d", i);
 		show_divisions();
 		show_buffer(buf, skip, nibbles, CH_XOFF, XRES, zoom, pos);
-		show_freq(freq);
+		show_freq(freq, zoom);
 		update();
 
 		while (1) {