The phrase "approximately as often" is correct and usable in written English.
It can be used when comparing the frequency of two or more events or actions that occur with similar regularity.
Example: "She visits her grandmother approximately as often as she visits her parents."
Alternatives: "about as frequently" or "roughly as often".
Once socially paired in experiment 3 (on average 10 months later), these 20 females engaged in extra-pair copulations approximately twice as often as the remaining 43 females that had not copulated before pair formation (GLM with binomial errors: Chi2 (1) = 12.4, P = 0.0004; Fig. 1a).
Irritable bowel syndrome affects females approximately twice as often as males and is most frequently diagnosed in individuals between the ages of 30 and 50 years [ 1, 2].
Overall, the dibromide isotopic signature was detected approximately twice as often as the dichloride and three times as often as the monobromide signatures (for the false negative rate and ROC analysis see Supplementary Figures 6 and 7, respectively).
Bumble bees visited plants from outbred subpopulations approximately twice as often (1.9 2.5×) as inbred subpopulations despite the fact that mean pollen viability in the OL and OH subpopulations was equivalent to both of the inbred subpopulations.
Patients with acne who made their first suicide attempt in connection with isotretinoin treatment made new attempts approximately twice as often as did those who made their first suicide attempt before the exposure to isotretinoin.
This was done to mimic the pattern the missing data seen in our cohort where question 6 was found to be missing approximately twice as often as other questions among the incomplete cases.
For the T-bulge, transitions between states occur approximately twice as often for MutS-E41A as for MutS, but this increase in dynamics does not significantly alter the occupancies of the different conformational states or the dominant transitions, which are between I and U.
Regarding indels, Sundström et al. (2003) conducted comparative analysis on intron sequences of paralogs in primates and birds and revealed that in birds with female heterogamety, indels occurred in the Z chromosome approximately twice as often as in the W chromosome, and that in primates with male heterogamety, indels occurred at similar rates in both the X and Y chromosome.
If these figures are reasonable, our average student has interacted with librarians approximately 1.1% as often as she has interacted with faculty in the classroom.
