In a certain way,

DIAMOND is coded as $\left[2233113352722\right]$ 

BRONZE is coded as $\left[223335272135\right]$

then SILVER will be coded as

In the word 'QUARANTINE', which letter comes seven letters before the letter which comes four letters after the second appearance of the first letter to occur twice times in the word?

In certain code language, $POPULAR$ is coded as $\left[3236282230\right]$, $VOCALIST$ is coded as $\left[251615103129\right]$, then $TEACHER$ will be coded in the language?