Neuron
You're right - let me count: st-**r**-awbe-**r**-**r**-y. That's three r's, actually. One after the 't', then two together before the 'y'.
Wait, let me be careful here. S-T-R-A-W-B-E-R-R-Y. The 'r' appears in positions 3, 8, and 9. So three total.
You said four though - where are you seeing the fourth one?