In my experience, getting a reluctant baby to take a bottle is a headache, a heartache, and a pain. It may be worth it in some circumstances (we stuck it out because I was starting grad school and needed to send DS to daycare). If you are going to do it, you cannot do it for "just a couple times a week." If you give bottles that infrequently, you're basically starting the adaptation process over with every bottle. Either there is at least a bottle at least daily while you're establishing this, and most days once it ceases to be hard, or you hold off and cope with the process when you really need to do it.
Your best bet for introducing a bottle, IMO, is for you - Mom - to leave the premises. Or send Dad and baby elsewhere, like to Grandma's house. If you're there, the baby will smell the milk on you, and be really unlikely to settle for the bottle. Dad should settle down someplace comfy that isn't a place where you frequently nurse (so the bed and the nursery rocking chair are out). And then Dad just has to be patient. Offer the bottle, let the baby reject the bottle, put the bottle back in the warmer, hold the baby and pat his back, try and murmur soothing things, offer the bottle again. It's really important that Dad stay as chill as possible, so if Dad chooses to approach this with earplugs, a good movie, the internet at hand, or anything else that will keep him soothed and entertained through the process, that is fine.
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