Welcome to ireland Reaching Out!
Baptismal records for the RC church of Kilfree/Killaraght do not start until 1873. Marriage records start in 1848. Here is the link to the parish register http://registers.nli.ie/parishes/0132 This would be the current day parish of Gurteen. I don't know if you have Google Maps but I can see Doon just to the east of Carrowntemple not far from where the three counties ( Mayo, Sligo and Roscommon) meet. It is also not far from the Mayo village of Cloontia. My great-great grandparents came from the Cloontia area and they worshiped at St. James Carracastle (at least that is where the records were kept) until they were reassigned around 1880 to the Cathedral in Ballaghaderreen.
As you know there are many Duffys and Frains in the general Ballaghaderreen area out to the parish of Kilmovee in Mayo. My great-grandmother was Mary Duffy (1858-1939) who wa sborn in Magheraboy, Kilmovee and married a farmer named Bernard Roddy who lived a mile outside of Ballaghaderreen.
Have you considered autosomal DNA testing to see who you match and possibly you match someone who has more info on your families.
Let me know if you have questions.