I can’t specifically tell you where Frankford is. It’s possibly a townland that no longer exists or a house that’s been demolished. The border between Armagh & Monaghan has not changed over the years. On-line references seem to suggest it’s in Clonfeacle parish.
However that particular will has survived (or a transcript of it has). It’s held in PRONI in Belfast ref T/664 page 15. Might be worth reading it. There’s also information on what must be the same will on T/281/2 page 7 and that gives the townland as Frankfield. So might be confusion about the precise spelling.
Will extract here:
https://www.wikitree.com/wiki/Hamilton-28097
PRONI has several other documents relating to Hans of Frankford. This deed dated 30.6.1738 (D778/85A) is an example:
Robert Hamilton of Frankford, Armagh, son and heir of Hans Hamilton, deceased and James Hamilton of Catherlough to Arthur Hill of Bellvoir, Co. Down, esq. - Reconveyance of the manor of Hollywood and three quarters of Ballyknockan and the following annual fee farm rents: £2 from Listowder and the mill thereof; £3 from Ballydyan; £5 from Lagigowne; £24 from Hollywood; £5 from Ballyrusselly; £3.15 from Ballyrainey; £7 from Ballycultra and Cregevade; £3 from the mill and mill lands of Dundonnell; £10 from Ballygrainey; £1 from Dunlady; £2.5. from Ballymenoch; £6.9.8 from Knocknegoney, Killeen, Ballyregan and Ballymasca; £25 from Strandtown, Knock, Ballymechan and Ballyoran; £9 from Ballycloghan, Carrowmullan and Carrantagert; £13 from Ballyhackamore; £20 from Ballymacarritt and Owen O'Cork Mill; £2 from Ballylisbredan, Unicarvell and Castlebegg; £8.19 from Bredogh, Ballylessan, Edenderry, Ballynehatty and Ballynerevally; £52 from Crevilicaverick, Cargicroy, Drenans and mill; £2 from Lisleen; £8 from Taunaghmore: also the advowson of the churches of Knockbreda, Dundonell and Hollywood. This reconveyance is made to the uses laid down by a lease and release dated 1 and 2 July 1680, that is to the use of Anne Hamilton, wife of the said James Campbell - Hollywood, Ballyknockan, Listowder, Ballydyan, Lagigowne, Hollywood, Ballyrusselly, Ballyrainey, Ballycultra, Cregevade, Dundonnell, Ballygrainey, Dunlady, Ballymenoch, Knocknegoney, Killeen, Ballyregan, Ballymasca, Strandtown, Knock, Ballymechan, Ballyoran, Ballycloghan, Carrowmullan, Carrantagert, Ballyhackamore, Ballymacaritt, Ballylisbredan, Unicarvell, Castlebegg, Bredogh, Ballylessan, Edenderry, Ballynehatty and Ballynerevally, Crevilicaverick, Cargicroy, Drenans, Lisleene, Taunaghmore, Knockbreda, Dundonell, Hollywood.
The Journal of the Co Louth Archaeological Society (Vol 7, no 4 Dec 1932) has an article entitled” Louth and Armagh Old Wills” by Rev LP Murray. Hans Hamilton’s will gets discussed in it. I don’t know what it says because I don’t have access to the journal, but it’s listed.