09d80671_Using_prototype_js_v1_3_1__Property
[Type] Number [Kind] instance [Description] Interval (not frequency) between refreshes, in seconds. Defaults to 2 seconds. This number will be multiplied by the current decay when invoking theAjax.Updater object [Property] 
frequency
c o n t a i n e r
u r l
f r e q u e n c y
d e c a y
u p d a t e r
t i m e r
Using prototype.js v1.3.1
Property