diff --git a/notebooks/mobility.ipynb b/notebooks/mobility.ipynb
index 4f22c52..26be889 100644
--- a/notebooks/mobility.ipynb
+++ b/notebooks/mobility.ipynb
@@ -45,14 +45,54 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "ID = 3\n",
+    "def plot_uber(source_id, attribute_col, month, *args, **kwargs):\n",
+    "    return ( gdf[(gdf.sourceid==source_id) & (gdf.month==month)].dropna(subset=[attribute_col]).hvplot(\n",
+    "            geo=True, tiles='OSM', c=attribute_col, title=f'{attribute_col.title()} - Month: 2020-{month}', *args, **kwargs) * \n",
+    "        gdf[gdf.index==source_id].hvplot(geo=True).opts(active_tools=['wheel_zoom']))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
     "COL = 'mean_travel_time'\n",
-    "MONTH = 1\n",
-    "( \n",
-    "    gdf[(gdf.sourceid==ID) & (gdf.month==MONTH)].dropna(subset=[COL]).hvplot(\n",
-    "        geo=True, tiles='OSM', c=COL, title=f'{COL.title()} - Month: 2020-{MONTH}') * \n",
-    "    gdf[gdf.index==ID].hvplot(geo=True).opts(active_tools=['wheel_zoom'])\n",
-    ")"
+    "ID = 1\n",
+    "plot_uber(ID, COL, 1) + plot_uber(ID, COL, 2) + plot_uber(ID, COL, 3)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "jan = gdf[gdf.month==1].groupby('sourceid').count()\n",
+    "feb = gdf[gdf.month==2].groupby('sourceid').count()\n",
+    "mar = gdf[gdf.month==3].groupby('sourceid').count() "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "joined = feb.join(mar, lsuffix='_feb', rsuffix='_mar')\n",
+    "diff = joined[f'{COL}_mar'] - joined[f'{COL}_feb'] \n",
+    "diff.hvplot.hist(title='Histogram of destination area counts (March 2020 - Feb 2020)')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "joined = jan.join(feb, lsuffix='_jan', rsuffix='_feb')\n",
+    "diff = joined[f'{COL}_feb'] - joined[f'{COL}_jan'] \n",
+    "diff.hvplot.hist(title='Histogram of destination area counts (Feb 2020 - Jan 2020)')"
    ]
   },
   {