Mana wasn't aware of the phrase she'd used the last time the collar had been placed on her, so the difference went unheeded.  "Key phrase being<em>long enough</em>.  Given certain truths, that might very well be<em>years</em>before such level of comfort comes around.  And I know I don't have years before my comrades find out I'm gone and start a manhunt for me."  Probably.  She was valuable, or so she liked to believe.  Because it was that or knowing that no one would ever look for her, that she'd just be written off as MIA.