How to measure the time the cursor hovered over an hot spot

Hi all,
I have a task in which participants have to make a decision with two options. Therefore, I have created two hotspots, one for each option. What I want to measure is the time that the mousecursor 'hovers' over each option before a choice has been made (one of the two hotspots clicked). So for instance: if a user first hovers 2,5 seconds above option 1, then goes to option 2, hovers there for .45 seconds, then goes to option 1 again, hovering for .5 seconds before clicking, I want to save those two values (2.5 + .5 = 3.0 s for option 1 and .45 s for option 2) when either hotspot is clicked. I was thinking of using a conditional in my interaction icon using something similar to ObjecOver (which gives which display icon the cursor is currently over), but then have something like HotspotOver (which does not exist). Does anyone know how I can accomplish measuring these hovertimes?
Regards,
Frank

The solution I came up with has five hotspots. First off a calculation icon: OptionTimes := [0,0]
Then the interaction with the hotspots: single click option 1, cursor in area option 1, single click option 2, cursor in area option 2, finally a hotspot surrounding all others
In the cursor in area type hotspot for option 1 I have the calculation:
Option := 1
OptionStartTime := SystemSeconds
Hopefully you can see where this is going. There's a similar calc for option 2 in the cursor in area option 2. It just sets the Option number to 2. In the last hotspot that surrounds the others I have this:
OptionTimes[Option] := OptionTimes[Option] + SystemSeconds - OptionStartTime
When the user hovers over an option and then leaves, the hotspot surrounding the others catches them and records the time they spent. You also need that same calc in the response path for the two options to catch the time taken looking at the option just before clicking in their choice.
Mike

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