337661 divided by 91 
The aim is to understand the frequency of 91 in 337661.

Let's proceed to step 1:
91 goes into 3 0 times with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Take the next digit (3) from the dividend and append it to 3, then repeat: 33 / 91

Going ahead to step 2:
91 goes into 33 0 times with a remainder of 33.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 33 leaves us with 33.
Grab the next digit (7) from the dividend, add it to 33, then carry on: 337 / 91

Going ahead to step 3:
The number 91 fits into 337 3 times, leaving a remainder of 64.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 273 away from 337, we end up with 64.
Append the next digit (6) from the dividend to 64 and continue with: 646 / 91

Step 4:
646 divided by 91 is 7 with a remainder of 9.
Write down 7 as next digit of the result. 
Result so far: 37.0
If we subtract 637 from 646, we get 9.
Fetch the next digit (6) from the dividend, attach it to 9 and continue: 96 / 91

Moving on to step 5:
91 goes into 96 1 times with a remainder of 5.
Use 1 as the next digit of our solution. 
Result so far: 371.0
Subtract 91 from 96 to get 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 91

On to step 6:
The number 91 fits into 51 0 times, leaving a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 3710.0
Subtract 0 from 51 to get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Let's proceed to step 7:
510 divided by 91 is 5 with a remainder of 55.
Use 5 as the next digit of our solution. 
Result so far: 3710.5
Subtracting 455 from 510 leaves us with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Moving on to step 8:
550 divided by 91 is 6 with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 3710.56
Subtract 546 from 550 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 9:
The number 91 fits into 40 0 times, leaving a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 3710.56
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 10:
91 can be fit into 400 4 times, resulting in a remainder of 36.
Record the quotient 4 as the next digit in the result. 
Result so far: 3710.5604
The remainder is 36 after subtracting 364 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 11:
The number 91 fits into 360 3 times, leaving a remainder of 87.
The number 3 becomes the next digit in our result. 
Result so far: 3710.56043
Subtracting 273 from 360 leaves us with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Let's proceed to step 12:
The number 91 fits into 870 9 times, leaving a remainder of 51.
Use 9 as the next digit of our solution. 
Result so far: 3710.560439
Deduct 819 from 870 and we're left with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Advancing to step 13:
When dividing 510 by 91, we get 5 with a remainder of 55.
Use 5 as the next digit of our solution. 
Result so far: 3710.5604395
Subtract 455 from 510 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Going ahead to step 14:
91 goes into 550 6 times with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 3710.56043956
If we subtract 546 from 550, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Our division results in 3710.56043956 with a remaining 4e-09.