73620891 divided by 251 
The aim is to understand the frequency of 251 in 73620891.

Step 1:
251 can be fit into 7 0 times, resulting in a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (3) from the dividend to 7 and continue with: 73 / 251

Advancing to step 2:
73 divided by 251 is 0 with a remainder of 73.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 73, we get 73.
Fetch the next digit (6) from the dividend, attach it to 73 and continue: 736 / 251

Step 3:
When dividing 736 by 251, we get 2 with a remainder of 234.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 502 away from 736, we end up with 234.
Grab the next digit (2) from the dividend, add it to 234, then carry on: 2342 / 251

Going ahead to step 4:
The number 251 fits into 2342 9 times, leaving a remainder of 83.
The number 9 becomes the next digit in our result. 
Result so far: 29.0
Subtract 2259 from 2342 to get 83.
Fetch the next digit (0) from the dividend, attach it to 83 and continue: 830 / 251

Let's proceed to step 5:
251 goes into 830 3 times with a remainder of 77.
The number 3 becomes the next digit in our result. 
Result so far: 293.0
The remainder is 77 after subtracting 753 from 830.
Include the next digit (8) from the dividend after 77, then repeat: 778 / 251

Step 6:
778 divided by 251 is 3 with a remainder of 25.
The next digit of our result is 3. 
Result so far: 2933.0
If we take 753 away from 778, we end up with 25.
Include the next digit (9) from the dividend after 25, then repeat: 259 / 251

On to step 7:
251 goes into 259 1 times with a remainder of 8.
The next digit of our result is 1. 
Result so far: 29331.0
Deduct 251 from 259 and we're left with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 251

Let's proceed to step 8:
81 divided by 251 is 0 with a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 293310.0
If we take 0 away from 81, we end up with 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Step 9:
If we divide 810 by 251, we get 3 and a remainder of 57.
The next digit of our result is 3. 
Result so far: 293310.3
If we subtract 753 from 810, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

On to step 10:
251 can be fit into 570 2 times, resulting in a remainder of 68.
The next digit of our result is 2. 
Result so far: 293310.32
Subtracting 502 from 570 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 11:
When dividing 680 by 251, we get 2 with a remainder of 178.
The number 2 becomes the next digit in our result. 
Result so far: 293310.322
Subtract 502 from 680 to get 178.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

The final outcome is 293310.322, with a leftover of 0.0178.