64663599 divided by 959 
The aim is to understand the frequency of 959 in 64663599.

Step 1:
If we divide 6 by 959, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 959

Advancing to step 2:
When dividing 64 by 959, we get 0 with a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Bring next digit (6) of the dividend behind the 64 and repeat the process: 646 / 959

On to step 3:
If we divide 646 by 959, we get 0 and a remainder of 646.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 646 leaves us with 646.
Include the next digit (6) from the dividend after 646, then repeat: 6466 / 959

Moving on to step 4:
The number 959 fits into 6466 6 times, leaving a remainder of 712.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Subtract 5754 from 6466 to get 712.
Grab the next digit (3) from the dividend, add it to 712, then carry on: 7123 / 959

Advancing to step 5:
959 goes into 7123 7 times with a remainder of 410.
Record the quotient 7 as the next digit in the result. 
Result so far: 67.0
The remainder is 410 after subtracting 6713 from 7123.
Fetch the next digit (5) from the dividend, attach it to 410 and continue: 4105 / 959

On to step 6:
4105 divided by 959 is 4 with a remainder of 269.
The next digit of our result is 4. 
Result so far: 674.0
Subtracting 3836 from 4105 leaves us with 269.
Fetch the next digit (9) from the dividend, attach it to 269 and continue: 2699 / 959

Advancing to step 7:
959 goes into 2699 2 times with a remainder of 781.
Write down 2 as next digit of the result. 
Result so far: 6742.0
Subtract 1918 from 2699 to get 781.
Append the next digit (9) from the dividend to 781 and continue with: 7819 / 959

Going ahead to step 8:
959 can be fit into 7819 8 times, resulting in a remainder of 147.
The number 8 becomes the next digit in our result. 
Result so far: 67428.0
Subtract 7672 from 7819 to get 147.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

Moving on to step 9:
If we divide 1470 by 959, we get 1 and a remainder of 511.
Put 1 as the next digit of the answer. 
Result so far: 67428.1
Deduct 959 from 1470 and we're left with 511.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5110, and continue the process.

Moving on to step 10:
5110 divided by 959 is 5 with a remainder of 315.
Record the quotient 5 as the next digit in the result. 
Result so far: 67428.15
Subtracting 4795 from 5110 leaves us with 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Step 11:
When dividing 3150 by 959, we get 3 with a remainder of 273.
The number 3 becomes the next digit in our result. 
Result so far: 67428.153
Deduct 2877 from 3150 and we're left with 273.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2730, and continue the process.

On to step 12:
959 goes into 2730 2 times with a remainder of 812.
Use 2 as the next digit of our solution. 
Result so far: 67428.1532
If we subtract 1918 from 2730, we get 812.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8120, and continue the process.

Advancing to step 13:
If we divide 8120 by 959, we get 8 and a remainder of 448.
Use 8 as the next digit of our solution. 
Result so far: 67428.15328
Deduct 7672 from 8120 and we're left with 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

Step 14:
959 goes into 4480 4 times with a remainder of 644.
Put 4 as the next digit of the answer. 
Result so far: 67428.153284
If we subtract 3836 from 4480, we get 644.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6440, and continue the process.

Going ahead to step 15:
6440 divided by 959 is 6 with a remainder of 686.
Record the quotient 6 as the next digit in the result. 
Result so far: 67428.1532846
Deduct 5754 from 6440 and we're left with 686.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6860, and continue the process.

Step 16:
The number 959 fits into 6860 7 times, leaving a remainder of 147.
The number 7 becomes the next digit in our result. 
Result so far: 67428.15328467
If we subtract 6713 from 6860, we get 147.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

The quotient of the division is 67428.15328467, and the remainder is 1.47e-07.