Which preposition to use with disengagement

of Occurrences 6%

Q.Does the contact of water with heated metal occasion an instantaneous generation of steam? A.It is found that a sudden disengagement of steam does not immediately follow the contact of water with the hot metal, for water thrown upon red hot iron is not immediately converted into steam, but assumes the spheroidal form and rolls about in globules over the surface.

at Occurrences 3%

Example: Being at the ENGAGE, 1. Number one, feint straight thrust at chest; disengagement at chest; at stomach, lunge; 2. Number two, parry right, parry left, and low parry left; 3. ASSAULT.

in Occurrences 1%

Some Masters teach to hold the Sword in Guard between Quart and Tierce, and to disengage in that Situation; whereby the three Advantages which the Disengagement in Half-Quart gives you, are lost; that is to say, first, a good Air, secondly, the being covered with the Fort of the Sword, and thirdly, the Swiftness of the Thrust; because the Hand has not a sufficient Freedom of Motion.

Which preposition to use with  disengagement