We divide 91590583 by 408
The aim is to understand the frequency of 408 in 91590583.

Let's proceed to step 1:
The number 408 fits into 9 0 times, leaving a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 408

Advancing to step 2:
When dividing 91 by 408, we get 0 with a remainder of 91.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 91, we end up with 91.
Append the next digit (5) from the dividend to 91 and continue with: 915 / 408

On to step 3:
915 divided by 408 is 2 with a remainder of 99.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 816 from 915 and we're left with 99.
Fetch the next digit (9) from the dividend, attach it to 99 and continue: 999 / 408

Going ahead to step 4:
999 divided by 408 is 2 with a remainder of 183.
Use 2 as the next digit of our solution. 
Result so far: 22.0
Deduct 816 from 999 and we're left with 183.
Fetch the next digit (0) from the dividend, attach it to 183 and continue: 1830 / 408

Advancing to step 5:
408 goes into 1830 4 times with a remainder of 198.
Put 4 as the next digit of the answer. 
Result so far: 224.0
Deduct 1632 from 1830 and we're left with 198.
Bring next digit (5) of the dividend behind the 198 and repeat the process: 1985 / 408

Moving on to step 6:
1985 divided by 408 is 4 with a remainder of 353.
Use 4 as the next digit of our solution. 
Result so far: 2244.0
Subtracting 1632 from 1985 leaves us with 353.
Include the next digit (8) from the dividend after 353, then repeat: 3538 / 408

Going ahead to step 7:
408 can be fit into 3538 8 times, resulting in a remainder of 274.
The number 8 becomes the next digit in our result. 
Result so far: 22448.0
Deduct 3264 from 3538 and we're left with 274.
Take the next digit (3) from the dividend and append it to 274, then repeat: 2743 / 408

Moving on to step 8:
When dividing 2743 by 408, we get 6 with a remainder of 295.
The next digit of our result is 6. 
Result so far: 224486.0
Subtract 2448 from 2743 to get 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

Advancing to step 9:
408 goes into 2950 7 times with a remainder of 94.
Record the quotient 7 as the next digit in the result. 
Result so far: 224486.7
Deduct 2856 from 2950 and we're left with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Going ahead to step 10:
The number 408 fits into 940 2 times, leaving a remainder of 124.
Write down 2 as next digit of the result. 
Result so far: 224486.72
Subtracting 816 from 940 leaves us with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

On to step 11:
When dividing 1240 by 408, we get 3 with a remainder of 16.
Put 3 as the next digit of the answer. 
Result so far: 224486.723
If we subtract 1224 from 1240, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 12:
When dividing 160 by 408, we get 0 with a remainder of 160.
Put 0 as the next digit of the answer. 
Result so far: 224486.723
The remainder is 160 after subtracting 0 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

On to step 13:
The number 408 fits into 1600 3 times, leaving a remainder of 376.
Write down 3 as next digit of the result. 
Result so far: 224486.72303
Subtracting 1224 from 1600 leaves us with 376.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

Moving on to step 14:
408 goes into 3760 9 times with a remainder of 88.
Use 9 as the next digit of our solution. 
Result so far: 224486.723039
If we subtract 3672 from 3760, we get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Moving on to step 15:
408 goes into 880 2 times with a remainder of 64.
The next digit of our result is 2. 
Result so far: 224486.7230392
Subtract 816 from 880 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 16:
When dividing 640 by 408, we get 1 with a remainder of 232.
Write down 1 as next digit of the result. 
Result so far: 224486.72303921
If we subtract 408 from 640, we get 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

The final outcome is 224486.72303921, with a leftover of 2.32e-07.