"frequency of using" is a correct and usable phrase in written English.
You can use it to describe how often something is done, such as in the sentence: "The frequency of using online shopping has increased over the past decade."
Frequency of using the equipment in each period.
Gender, experience and frequency of using mobile shopping applications were used as moderators for all relationships.
The descriptive statistics of the frequency of using these variables as well as their regression coefficients follow this classification.
Frequency of using C-ARM for elective case i. Capacity needed for emergency cases of period t.
Further, SOP-visual affected frequency of using fashion magazines, catalogs, observed street-wear, and store displays as impersonal external sources of information (see Table 3).
(DOC 52 KB) 40536_2013_2_MOESM4_ESM.doc Additional file 4: Appendix D. Descriptive statistics of the frequency of using instructional variables in science in the three groups of countries.
Student perception of the frequency of using 17 modes of instruction common in mathematics classrooms were aggregated on the school level.
Second, in terms of the frequency of using child care institutions, the majority of mothers (98%) use them 5 days a week (from Monday to Friday).
Hypotheses three and four were developed to examine if degree of SOP-visual and SOP-verbal influences frequency of using sources of information for apparel shopping.
(DOC 108 KB) 40536_2013_2_MOESM3_ESM.doc Additional file 3: Appendix C. Descriptive statistics of the frequency of using instructional variables in mathematics in the three groups of countries.
To do that, the study used variables indicating the frequency of using child care service institutions and average monthly costs of use.
