not enough work credits to qualify for disability ins.

for 25 years my wife has been unable to hold down a job do to the fact that she was caring for my three children who all have disabilities. now that she can go back to work she found out she has arthritis in her feet and legs..and cant stand for long periods of time. doctors have her on pain medication and other rx's to help her. problem is, she does not have enough work credits to quailfy for disability benefits. she is 46 years old. does she qualify under my credits?