master in archtecture vs master on archtecture

Some examples from the web:

• There are thousands of Masters in management out there.
• To join my Master in Rozafa.
• Robyn was an undergrad, I was finishing my masters in administration...
• He played the master in our house.
• I am Vice Guild Master in charge of... tourism.
• The masters in English lit, for sure.
• Go wait for your master in his room.
• We'll call that nice girl who's getting her Masters in Child Development.
• Go back to your masters in King's Landing.
• The Italians are masters in car making.
• That's enough time for you to follow your master in shame and blood.
• He was a master in pacing.
• There's a Masters in the phone book.
• That Masters in psych is starting to pay off, Ducky.
• I met my Master in my dream.
• The title "master in lunacy" isn't used nowadays.
• Raymond Lamy, you are a master in this.
• Esther is a master in the art of possession.
• Yes, and another in chemistry with a masters in biology.
• There's a couple masters in the count room.

Some examples from the web:

• Waxman just gave us Rick Masters on a plate.
• With the mark of the Master on his shoulder.
• Certificate for service as master on ships of between 500 and 3000 gross tonnage.
• But the ECB is the only master on board when it comes to monetary policy.
• These do however not prejudice the decision of the master on the basis of his/her professional judgement corresponding to the SOLAS Convention.
• The original(s) of such a transhipment declaration may also be submitted by the representative of the master on his behalf.
• He's been sail master on The Pirates of the Caribbean.
• That Scout Master on New Penzance has now lost his entire troop.
• Yes, and, even better, I ran a master on the address, and a burglary report was filed yesterday.
• Information on estimated times for berthing and departure and on minimum water depth at the berth shall be progressively updated and passed to the master on receipt of successive ETA advice.
• I like to drive the horses hard, speeding my masters on their way.
• A navigational assistance service informs the master on difficult navigational or meteorological circumstances or assists him in case of defects or deficiencies.
• Improve the distribution of non-national European works on digital media for private use (DVD), in particular by encouraging publishers to cooperate on creating multilingual masters on a European scale.
• And before we knew it, there was a tear-up of biblical proportions, with the Doctor on one side and the Time Lords and the Master on the other.
• Whereas the Kingdom of the Netherlands has declared its willingness to prepare the film masters on behalf of the other Member States;
• You'll come for the 19th century thimble art, but you'll stay for the Dutch masters on bottle caps.
• Listen, I am a master on these machines, okay?
• He's familiar with a generous female form from his stint as wardrobe master on "Designing women."
• Asking for the Master on... your wedding night!
• The owner of the fishing vessel, or the master on its behalf, has the right to refuse a Mauritanian fisherman permission to embark on board a EU fishing vessel if the requirements set out in paragraphs 2.2 to 2.4 have not been complied with.