infrequency

n.

很少发生，罕见；

Infrequency of p53 gene mutations in ependymomas.
Infrequency of isolation of HTLV-III virus from saliva in AIDS.
The infrequency of "pure culture"diagnoses among the anxiety disorders.
Infrequency of “pure” GAD: Impact of psychiatric comorbidity on clinical course
The infrequency of malignant disease in diaphyseal aclasis and neurofibromatosis.
Infrequency of cytomegalovirus genome in coronary arteriopathy of human heart allografts.
Infrequency of Sexually Transmitted Disease Screening among Sexually Experienced U.S. Female Adolescents
Infrequency of Rickettsia rickettsii in Dermacentor variabilis removed from humans, with comments on the role of other human-biting ...
The Infrequency-Posttraumatic Stress Disorder scale (Fptsd) for the MMPI-2: development and initial validation with veterans present...
High prevalence of diarrhea but infrequency of documented Clostridium difficile in autologous peripheral blood progenitor cell trans...