I asked for the Anointing of the Sick twice. Each before a major surgery. My priest was very happy to do it. (We never know what can happen on the operating table!)
That is good and just the right attitude. I think some Catholics are of the opinion that it can only be received once, but that is not the case. God is very generous to us in the sacraments and we should take advantage of his generosity because this pleases Him and greatly aids us in our weakness.