I don't think there is a right or wrong because everyone deals with death and grief differently.
My husband died suddenly in 10/2015. (massive heart attack) I was bombarded with calls, notes, texts, in the beginning but people move on with their lives which is understandable.
We who are grieving are adjusting to a new normal and often feel very alone.
There are some of my husband's family members I've never heard from and we were married 27 years!!
There are some friends and some members on this site who to this day around the anniversary of his death and on holidays send me messages. Something as simple as "thinking of you" means a lot,
The hole in my heart will never heal. My husband is on my mind daily as I adjust, run our company, make decisions etc.
I, for one, as well as my 22 yr old daughter appreciate it when we get a note, text or call from someone because it means something to us when someone does think of us during the time that is most difficult.
It means someone is thoughtful enough to take a moment of their time to care about others.
Do what you feel is best and don't feel pressured by what someone may say is the "norm". With death and grieving, there is no "normal".