We look at the division of 90159060 by 372 
The aim is to understand the frequency of 372 in 90159060.

On to step 1:
The number 372 fits into 9 0 times, leaving a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Append the next digit (0) from the dividend to 9 and continue with: 90 / 372

Step 2:
372 goes into 90 0 times with a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 90 and we're left with 90.
Bring next digit (1) of the dividend behind the 90 and repeat the process: 901 / 372

Advancing to step 3:
372 can be fit into 901 2 times, resulting in a remainder of 157.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 744 from 901 and we're left with 157.
Append the next digit (5) from the dividend to 157 and continue with: 1575 / 372

On to step 4:
372 can be fit into 1575 4 times, resulting in a remainder of 87.
Record the quotient 4 as the next digit in the result. 
Result so far: 24.0
Deduct 1488 from 1575 and we're left with 87.
Bring next digit (9) of the dividend behind the 87 and repeat the process: 879 / 372

Moving on to step 5:
When dividing 879 by 372, we get 2 with a remainder of 135.
Record the quotient 2 as the next digit in the result. 
Result so far: 242.0
Deduct 744 from 879 and we're left with 135.
Grab the next digit (0) from the dividend, add it to 135, then carry on: 1350 / 372

On to step 6:
372 can be fit into 1350 3 times, resulting in a remainder of 234.
Put 3 as the next digit of the answer. 
Result so far: 2423.0
Subtracting 1116 from 1350 leaves us with 234.
Append the next digit (6) from the dividend to 234 and continue with: 2346 / 372

On to step 7:
2346 divided by 372 is 6 with a remainder of 114.
The next digit of our result is 6. 
Result so far: 24236.0
Deduct 2232 from 2346 and we're left with 114.
Bring next digit (0) of the dividend behind the 114 and repeat the process: 1140 / 372

Advancing to step 8:
372 can be fit into 1140 3 times, resulting in a remainder of 24.
The number 3 becomes the next digit in our result. 
Result so far: 242363.0
The remainder is 24 after subtracting 1116 from 1140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 9:
372 goes into 240 0 times with a remainder of 240.
Put 0 as the next digit of the answer. 
Result so far: 242363.0
If we take 0 away from 240, we end up with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Moving on to step 10:
2400 divided by 372 is 6 with a remainder of 168.
Put 6 as the next digit of the answer. 
Result so far: 242363.06
If we subtract 2232 from 2400, we get 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Moving on to step 11:
When dividing 1680 by 372, we get 4 with a remainder of 192.
Write down 4 as next digit of the result. 
Result so far: 242363.064
Subtract 1488 from 1680 to get 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Going ahead to step 12:
If we divide 1920 by 372, we get 5 and a remainder of 60.
The next digit of our result is 5. 
Result so far: 242363.0645
Deduct 1860 from 1920 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 13:
When dividing 600 by 372, we get 1 with a remainder of 228.
Use 1 as the next digit of our solution. 
Result so far: 242363.06451
Subtract 372 from 600 to get 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

On to step 14:
If we divide 2280 by 372, we get 6 and a remainder of 48.
Write down 6 as next digit of the result. 
Result so far: 242363.064516
Subtract 2232 from 2280 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 15:
If we divide 480 by 372, we get 1 and a remainder of 108.
The number 1 becomes the next digit in our result. 
Result so far: 242363.0645161
Subtracting 372 from 480 leaves us with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Step 16:
372 goes into 1080 2 times with a remainder of 336.
Put 2 as the next digit of the answer. 
Result so far: 242363.06451612
Subtracting 744 from 1080 leaves us with 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

The final result is 242363.06451612 with a remainder of 3.36e-07.