shorter 'Checked' wording; 'On average' seems to be a bit more in use than 'In average'

deltachat-ios/en.lproj/Localizable.strings

@@ -862,6 +862,6 @@
 "notifications_disabled_dc" = "Disabled in Delta Chat";
 "notifications_disabled" = "Disabled in system settings";
 "delayed" = "Delayed";
-"notifications_avg_minutes" = "In average every %1$d minutes";
-"notifications_avg_hours" = "In average every %1$d hours";
-"last_check_at" = "Last check at %1$@";
+"notifications_avg_minutes" = "On average every %1$d minutes";
+"notifications_avg_hours" = "On average every %1$d hours";
+"last_check_at" = "Checked at %1$@";

scripts/untranslated.xml

@@ -15,7 +15,7 @@
     <string name="notifications_disabled_dc">Disabled in Delta Chat</string>
     <string name="notifications_disabled">Disabled in system settings</string>
     <string name="delayed">Delayed</string>
-    <string name="notifications_avg_minutes">In average every %1$d minutes</string>
-    <string name="notifications_avg_hours">In average every %1$d hours</string>
-    <string name="last_check_at">Last check at %1$s</string>
+    <string name="notifications_avg_minutes">On average every %1$d minutes</string>
+    <string name="notifications_avg_hours">On average every %1$d hours</string>
+    <string name="last_check_at">Checked at %1$s</string>
 </resources>