@senhorzinho here is how i put timers into the prototype. basically, each field has its own onfocus and onblur timer, and the datum collects them into a timeSpent object, whcih it saves into the activies. here is an example output: 
```
timeSpent: {
	editingTimeSpent: 4.228,
	editingTimeDetails: [
		"utterance->a new item modified by my friend. and me too:::3214",
		"gloss->? ? ? ? ? ? ? ? ? ?:::1",
		"validationStatus->Checked:::1013"
	],
	totalTimeSpent: 21.833,
	readTimeSpent: 17.605
}
```