Context : We proposed that the spectral evolution of transient X-ray binaries ( XrBs ) is due to an interplay between two flows : a standard accretion disk ( SAD ) in the outer parts and a jet-emitting disk ( JED ) in the inner parts .
We showed that the spectral evolution in X-ray and radio during the 2010-2011 outburst of GX 339-4 can be recovered .
However , the observed variability in the X-ray wavelength was never addressed in this framework .

Aims : We investigate the presence of low-frequency quasi-periodic oscillations ( LFQPOs ) during an X-ray outburst , and address the possible correlation between the frequencies of these LFQPOs and the transition radius between the two flows , r _ { J } .

Methods : We selected X-ray and radio data that correspond to three outbursts of GX 339-4 .
We used the method detailed in previous papers to obtain the best parameters , r _ { J } ( t ) and \dot { m } _ { in } ( t ) , for each outburst .
We also independently searched for X-ray QPOs in each selected spectra and compared the QPO frequency to the Kepler and epicyclic frequencies of the flow in r _ { J } .

Results : We successfully reproduce the evolution of the X-ray spectra and the radio emission for three different activity cycles of GX 339-4 .
We use a unique normalization factor for the radio emission , \tilde { f } _ { R } .
We also report the detection of seven new LFQPOs ( three Type B and four Type C ) , in addition to those previously reported in the literature .
We show that the Type C QPOs frequency can be linked to the dynamical JED-SAD transition radius r _ { J } , rather than to the optically thin-thick transition radius in the disk .
The scaling factor q such that \nu _ { QPO } \simeq \nu _ { K } ( r _ { J } ) / q is q \simeq 70 - 140 ; this factor is consistent over the four cycles and is similar to previous studies .

Conclusions : The JED-SAD hybrid disk configuration not only provides a successful paradigm that allows us to describe XrB cycles , but also matches the evolution of QPO frequencies .
Type C QPOs provide an indirect way to probe the JED-SAD transition radius , where an undetermined process produces secular variability .
The demonstrated relation between the transition radius links Type C QPOs to the transition between two different flows , effectively tying it to the inner magnetized structure , that is , the jets .
This direct connection between the ( accretion-ejection ) structure of the jets and the process responsible for Type C QPOs , if confirmed , could naturally explain their puzzling multiwavelength behavior .