--- a/content/10MHz_ref.rst	Thu Mar 10 21:16:37 2016 +0100
+++ b/content/10MHz_ref.rst	Sat Mar 12 01:36:16 2016 +0100
@@ -36,7 +36,7 @@
 .. image:: {filename}images/freq_ref/efratom_inside.jpg
    :alt: The PCB of the Efratom LPRO-101 frequency standard.
 
-The rubidium lamp with the resonant cavity occupy almost 1/4 of the
+The rubidium lamp with the resonant cavity occupy almost a quarter of the
 total area. The cover of the enclosure is compartimented, mainly to
 shield the lamp+cavity device from the remaining of the board: